Tag Archives: shaft drilling

China wholesaler CNC Turning Aluminum Drilling Circular Saw Shaft Electric Fan Motor Shaft near me shop

Product Description

 

Product Description

Business type Factory/manufacturer

Service

CNC machining
Turning and milling
CNC turning
OEM parts

Material

(1) Aluminum:AL 6061-T6,6063,7075-T
(2)Stainless steel:303,304,316L,17-4(SUS630)
(3)Steel:4140,Q235,Q345B,20#,45#
(4)Titanium:TA1,TA2/GR2,TA4/GR5,TC4,TC18
(5)Brass:C36000(HPb62),C37700(HPb59),C26800(H68)
(6)Copper, bronze, magnesium alloy, Delan, POM, acrylic, PC, etc.
Service OEM/ODM avaliable

Finish

Sandblasting, anodizing, Blackenning, zinc/Nickl plating, Poland
Powder coating, passivation PVD plating titanium, electrogalvanization
Chrome plating, electrophoresis, QPQ
Electrochemical polishing, chrome plating, knurling, laser etching Logo
Major equipment CNC machining center (milling machine), CNC lathe, grinding machine
Cylindrical grinding machine, drilling machine, laser cutting machine
Graphic format STEP, STP, GIS, CAD, PDF, DWG, DXF and other samples
Tolerance +/-0.003mm
Surface roughness Ra0.1~3.2
Inspection Complete testing laboratory with micrometer, optical comparator, caliper vernier, CMM
Depth caliper vernier, universal protractor, clock gauge, internal Celsius gauge

Detailed Photos

Product Parameters

MATERIAL AVAILABLE
Aluminum Stainless Steel Brass Copper Plastic Iron
AL2571 SS201 C22000 C15710 POM Q235
ALA380 SS301 C24000 C11000 PEEK Q345B
AL5052 SS303 C26000 C12000 PVC 1214 / 1215
AL6061 SS304 C28000 C12200 ABS 45#
AL6063 SS316 C35600 etc. Nylon 20#
AL6082 SS416 C36000   PP 4140 / 4130
AL7075 etc. C37000   Delrin 12L14
etc.   etc.   etc. etc.
SURFACE TREATMENT
Aluminum Parts Stainless Steel Parts Steel Parts Brass Parts
Clear Anodized Polishing Zinc Plating Nickel Plating
Color Anodized Passivating Oxide black chrome plating
Sandblast Anodized Sandblasting Nickel Plating Electrophoresis black
Chemical Film Laser engraving Powder Coated Powder coated
Brushing Electrophoresis black Heat treatment Gold plating
Polishing Oxide black Chrome Plating etc.
Chroming etc etc  
etc      
TOLERANCE
The smallest tolerance can reach +/-0.001mm or as per drawing request.
DRAWING FORMAT
PFD Step Igs CAD Solid etc

Packaging & Shipping

Company Profile

HangZhou Shinemotor Co.,Ltd located in HangZhou City, ZheJiang Province of China.
Mainly specializes in developing, manufacturing and selling all kinds of customized metal and plastic parts.

Our factory pass SGS, ISO9001/ ISO9001/ ISO14001 verification, parts can be widely used in the fields of automobile,
medical instruments, electronic communications, industrial and consumer applications and so on.

We have introduced a series of advanced and high performance production equipment imported from Japan and ZheJiang :
High precision cnc lathes, 5/6 axis cnc machining centers, plane grinding & centerless grinding machines,
stamping machines, wire cut machines, EDM and many other high-precision CNC equipment.
Our inspection equipment includes: projector, 2D, 2.5D, CMM, hardness testing machine, tool microscope, etc.

We dedicated to developing and producing kinds of brass, aluminum, steel, stainless steel
And plastic machining parts, stamping parts, and also CZPT design and manufacturing.

We firmly hold the concept of  ” customer is the first, honesty is the basic, accrete win-win “. 
Dedicated to providing you with high-quality products and excellent service!
We sincerely look forward to creating a better future by mutually beneficial cooperation with you.
 

FAQ

1. Are you a factory or a trading company?

A: We are a factory which has been specialized in cnc machining & automatic manufacturing for more than 10 years.

2. Where is your factory and how can I visit it?
A: Our factory is located in HangZhou city and you can get more detailed information by browsing our website.

3. How long can I get some samples for checking and what about the price?
A: Normally samples will be done within 1-2 days (automatic machining parts) or 3-5 day (cnc machining parts).
The sample cost depends on all information (size, material, finish, etc.).
We will return the sample cost if your order quantity is good.

4. How is the warranty of the products quality control?
A: We hold the tightend quality controlling from very begining to the end and aim at 100% error free.

5.How to get an accurate quotation?
♦ Drawings, photos, detailed sizes or samples of products.
♦ Material of products.
♦ Ordinary purchasing quantity.
 Quotation within 1~6 hours

 

Stiffness and Torsional Vibration of Spline-Couplings

In this paper, we describe some basic characteristics of spline-coupling and examine its torsional vibration behavior. We also explore the effect of spline misalignment on rotor-spline coupling. These results will assist in the design of improved spline-coupling systems for various applications. The results are presented in Table 1.
splineshaft

Stiffness of spline-coupling

The stiffness of a spline-coupling is a function of the meshing force between the splines in a rotor-spline coupling system and the static vibration displacement. The meshing force depends on the coupling parameters such as the transmitting torque and the spline thickness. It increases nonlinearly with the spline thickness.
A simplified spline-coupling model can be used to evaluate the load distribution of splines under vibration and transient loads. The axle spline sleeve is displaced a z-direction and a resistance moment T is applied to the outer face of the sleeve. This simple model can satisfy a wide range of engineering requirements but may suffer from complex loading conditions. Its asymmetric clearance may affect its engagement behavior and stress distribution patterns.
The results of the simulations show that the maximum vibration acceleration in both Figures 10 and 22 was 3.03 g/s. This results indicate that a misalignment in the circumferential direction increases the instantaneous impact. Asymmetry in the coupling geometry is also found in the meshing. The right-side spline’s teeth mesh tightly while those on the left side are misaligned.
Considering the spline-coupling geometry, a semi-analytical model is used to compute stiffness. This model is a simplified form of a classical spline-coupling model, with submatrices defining the shape and stiffness of the joint. As the design clearance is a known value, the stiffness of a spline-coupling system can be analyzed using the same formula.
The results of the simulations also show that the spline-coupling system can be modeled using MASTA, a high-level commercial CAE tool for transmission analysis. In this case, the spline segments were modeled as a series of spline segments with variable stiffness, which was calculated based on the initial gap between spline teeth. Then, the spline segments were modelled as a series of splines of increasing stiffness, accounting for different manufacturing variations. The resulting analysis of the spline-coupling geometry is compared to those of the finite-element approach.
Despite the high stiffness of a spline-coupling system, the contact status of the contact surfaces often changes. In addition, spline coupling affects the lateral vibration and deformation of the rotor. However, stiffness nonlinearity is not well studied in splined rotors because of the lack of a fully analytical model.
splineshaft

Characteristics of spline-coupling

The study of spline-coupling involves a number of design factors. These include weight, materials, and performance requirements. Weight is particularly important in the aeronautics field. Weight is often an issue for design engineers because materials have varying dimensional stability, weight, and durability. Additionally, space constraints and other configuration restrictions may require the use of spline-couplings in certain applications.
The main parameters to consider for any spline-coupling design are the maximum principal stress, the maldistribution factor, and the maximum tooth-bearing stress. The magnitude of each of these parameters must be smaller than or equal to the external spline diameter, in order to provide stability. The outer diameter of the spline must be at least 4 inches larger than the inner diameter of the spline.
Once the physical design is validated, the spline coupling knowledge base is created. This model is pre-programmed and stores the design parameter signals, including performance and manufacturing constraints. It then compares the parameter values to the design rule signals, and constructs a geometric representation of the spline coupling. A visual model is created from the input signals, and can be manipulated by changing different parameters and specifications.
The stiffness of a spline joint is another important parameter for determining the spline-coupling stiffness. The stiffness distribution of the spline joint affects the rotor’s lateral vibration and deformation. A finite element method is a useful technique for obtaining lateral stiffness of spline joints. This method involves many mesh refinements and requires a high computational cost.
The diameter of the spline-coupling must be large enough to transmit the torque. A spline with a larger diameter may have greater torque-transmitting capacity because it has a smaller circumference. However, the larger diameter of a spline is thinner than the shaft, and the latter may be more suitable if the torque is spread over a greater number of teeth.
Spline-couplings are classified according to their tooth profile along the axial and radial directions. The radial and axial tooth profiles affect the component’s behavior and wear damage. Splines with a crowned tooth profile are prone to angular misalignment. Typically, these spline-couplings are oversized to ensure durability and safety.

Stiffness of spline-coupling in torsional vibration analysis

This article presents a general framework for the study of torsional vibration caused by the stiffness of spline-couplings in aero-engines. It is based on a previous study on spline-couplings. It is characterized by the following 3 factors: bending stiffness, total flexibility, and tangential stiffness. The first criterion is the equivalent diameter of external and internal splines. Both the spline-coupling stiffness and the displacement of splines are evaluated by using the derivative of the total flexibility.
The stiffness of a spline joint can vary based on the distribution of load along the spline. Variables affecting the stiffness of spline joints include the torque level, tooth indexing errors, and misalignment. To explore the effects of these variables, an analytical formula is developed. The method is applicable for various kinds of spline joints, such as splines with multiple components.
Despite the difficulty of calculating spline-coupling stiffness, it is possible to model the contact between the teeth of the shaft and the hub using an analytical approach. This approach helps in determining key magnitudes of coupling operation such as contact peak pressures, reaction moments, and angular momentum. This approach allows for accurate results for spline-couplings and is suitable for both torsional vibration and structural vibration analysis.
The stiffness of spline-coupling is commonly assumed to be rigid in dynamic models. However, various dynamic phenomena associated with spline joints must be captured in high-fidelity drivetrain models. To accomplish this, a general analytical stiffness formulation is proposed based on a semi-analytical spline load distribution model. The resulting stiffness matrix contains radial and tilting stiffness values as well as torsional stiffness. The analysis is further simplified with the blockwise inversion method.
It is essential to consider the torsional vibration of a power transmission system before selecting the coupling. An accurate analysis of torsional vibration is crucial for coupling safety. This article also discusses case studies of spline shaft wear and torsionally-induced failures. The discussion will conclude with the development of a robust and efficient method to simulate these problems in real-life scenarios.
splineshaft

Effect of spline misalignment on rotor-spline coupling

In this study, the effect of spline misalignment in rotor-spline coupling is investigated. The stability boundary and mechanism of rotor instability are analyzed. We find that the meshing force of a misaligned spline coupling increases nonlinearly with spline thickness. The results demonstrate that the misalignment is responsible for the instability of the rotor-spline coupling system.
An intentional spline misalignment is introduced to achieve an interference fit and zero backlash condition. This leads to uneven load distribution among the spline teeth. A further spline misalignment of 50um can result in rotor-spline coupling failure. The maximum tensile root stress shifted to the left under this condition.
Positive spline misalignment increases the gear mesh misalignment. Conversely, negative spline misalignment has no effect. The right-handed spline misalignment is opposite to the helix hand. The high contact area is moved from the center to the left side. In both cases, gear mesh is misaligned due to deflection and tilting of the gear under load.
This variation of the tooth surface is measured as the change in clearance in the transverse plain. The radial and axial clearance values are the same, while the difference between the 2 is less. In addition to the frictional force, the axial clearance of the splines is the same, which increases the gear mesh misalignment. Hence, the same procedure can be used to determine the frictional force of a rotor-spline coupling.
Gear mesh misalignment influences spline-rotor coupling performance. This misalignment changes the distribution of the gear mesh and alters contact and bending stresses. Therefore, it is essential to understand the effects of misalignment in spline couplings. Using a simplified system of helical gear pair, Hong et al. examined the load distribution along the tooth interface of the spline. This misalignment caused the flank contact pattern to change. The misaligned teeth exhibited deflection under load and developed a tilting moment on the gear.
The effect of spline misalignment in rotor-spline couplings is minimized by using a mechanism that reduces backlash. The mechanism comprises cooperably splined male and female members. One member is formed by 2 coaxially aligned splined segments with end surfaces shaped to engage in sliding relationship. The connecting device applies axial loads to these segments, causing them to rotate relative to 1 another.

China wholesaler CNC Turning Aluminum Drilling Circular Saw Shaft Electric Fan Motor Shaft     near me shop China wholesaler CNC Turning Aluminum Drilling Circular Saw Shaft Electric Fan Motor Shaft     near me shop

China OEM Copper Aluminum Stainless Steel Carbon Fiber Turning Drilling Drive Shaft Core Titanium Cnc Centro De Usinagem Cnc Lathe Parts with Best Sales

CNC Machining or Not: Cnc Machining
Variety: DRILLING, Laser Machining, Milling, Other Machining Solutions, Turning, Speedy Prototyping
Materials Abilities: Aluminum, Brass, Bronze, Copper, Stainless Metal, Metal Alloys, aluminum Copper Stainless Steel carbon fiber POM PP Computer
Micro Machining or Not: Micro Machining
Product Amount: MH001
Supplies: Aluminum, copper, brass, stainless steel
Surface area Treatment: Anodizing,Brushing,Galvanized,laser engraving, Silk printing,sprucing
Tolerance: +/-.01mm, one hundred% QC good quality inspection ahead of shipping
Tests gear: CMMTool microscopemulti-joint armAutomatic top gauge
Area remedy: Color anodized, Laser carving,Nickel plated, Powder coated,
Processing: CNC turning, CNC milling, CNC machining, Grinding, EDM wire chopping
File Formats: Sound Functions,Pro/Engineer, AutoCAD(DXF,DWG), PDF,TIF and so forth.
High quality Assurance: ISO9001:2015 Certified.TUV
Model: MING HAO
MOQ: 1 Pcs
Packaging Specifics: Paper cartonWooden scenario deal.
Port: HangZhou/HangZhou/HongKong/ZheJiang

Goods Description Custom made CNC Machining Parts of Most ComponentsQuotationIn accordance to your drawing(size, material, thickness, processing articles and essential technologies, and so on.)Tolerance丨Surface Roughness+/-.005 – .01mm 丨 Ra0.2 – Ra3.2(Customize avaiable)Components AvaiableAluminum, Copper, Stainless Steel, Iron, PE, DCY Collection Cone-column Large Power high torque transmission gearbox cylindrical bevel equipment reducer for petrochemical sector PVC, Abdominal muscles, etc.Surface area RemedySharpening, standard/hard/colour oxidation, area chamfering, tempering, and so forth.ProcessingCNC Turning, Milling areas, Drilling, Vehicle Lathe, Tapping, Bushing, Surface Treatment, and so on.Screening ToolsCMM / Tool microscope / multi-joint arm / Automatic top gauge / Handbook peak gauge / Dial gauge / Roughness measurementDrawing FormatsPro/E, Auto CAD, Strong Operates , UG, CAD / CAM / CAE, PDFOur Benefitsone.) 24 Several hours On the web Support & Quickly Estimate / Shipping and delivery.two.) 100% QC top quality inspection ahead of supply, and can offer quality inspection form.three.) eighteen+ many years of encounter in the CNC machining spot and have a senior design team to provide excellent modification tips. Surface TherapyWe Can Do: Anodizing, difficult anodized,sharpening, electroplate, chrome, etched, engraving, silk print and so on. If you require anything at all else, make sure you explain to us >>>Go Consumer Evaluation Get Free Quotation >>> Company Profile Ming Hao Quick prototyping producer is an bold ISO registered company, specialised in CNC machining and focusing on exceptional workmanship, absolute high quality, cleanliness and on-time direct time. We focus in the creation of metal and plastic CNC machining and 3D printing rapid prototyping. We are a staff of proficient and knowledgeable engineers, machinists and technical consultants, who dedicate to help remedy difficulties relative to production precision and intricate machined elements, such as design and style,solution costing, good quality, Wholesale Price tag 6 Speed MLGU Gearbox Transmission Equipment sixth Gear 31 Teeth For Fiat Ducato Peugeot Boxer Citroen Relay 9649785718 assembly issues and so forth. Crew perform: We have experienced engineers, programmers, QC, product sales and management staff. Each member is firmly connected to properly fulfill customers’ orders. Engineers, programmers and staff share new suggestions and skills with each other to continually enhance machining skill.Excellent interaction: Income customers are fluent English speaking, proactive and have understanding about machining, They can simply comprehend what you want.What can make Minghao Tech different fromother machining organization is that MingHao is the label of outstanding top quality and high effectiveness. We have imported numerous high-tech products during these many years, for example 4 axis CNC machining heart, which allows us to make complex and micro-equipment precision parts more rapidly than at any time. Aside from, we also have long phrase cooperated partners on sheet metal, stamping, injection and die casting We can provide A single-cease service to fulfill your entire undertaking. No issue our CNC milling companies, CNC turning companies or other producing service, we supply our client greatest precision and velocity.When getting customers’ 1st inquiry, we start to study their layout at 1st time, using them as our very own initiatives, and recommend the best production strategy to bring them to daily life. We usually provide excellent customer provider and support buyer launch new items on Health care, Aerospace, Automotive, and Client Digital market soonest feasible.We’re versatile ample, treatment sufficient and CZPT adequate to supply what you want. No make a difference what variety of your task, massive or small, we do our very best to provide you highest top quality and competitive cost areas with ideal support. Get us involved early, we will assist you devote your money sensibly!Welcome to examine your concepts with our specialized team >>>Go WORKSHOP Get Free Quotation >>> Go Why Select Us One particular-stop RemedyFrom mould design and style, mold creating, machining, fabrication, welding, surface remedy, assembly, packing to shippingQuality GuaranteeWe have a expert staff to management the quality. Skilled engineers, precision machines, CMM and shut-loop QC method,100% inspection and make positive the shipment with higher top quality goods.Buyer ServiceEvery shopper is served by a specialized product sales for well timed specialized assistance and after-revenue support Skilled Complex Groupeighty% of our complex engineers have a lot more than twenty yeasrs of CNC machining experi-ence and professional technology to develop the specialist merchandise. Precision MachiningOur organization articles:CNC machining and the finished goods,such as the assembly of all sorts of hardware and plastic materials, clamp 1012mm action motor servo motor shaft coupler drive shaft coupling disconnect 3D printing prototype and speedy prototyping. Supply On TimeShipping and delivery-on-time of orders is our services plan. we operate hard to supply the high high quality merchandise and great sakes provider for each client. Item Packaging Transport

How to notify if your driveshaft demands replacing

What is the lead to of the unbalanced travel shaft? Unstable U-joint? Your auto may possibly make clicking noises while driving. If you can hear it from both sides, it may be time to hand it more than to the mechanic. If you are not certain, read through on to find out much more. Fortunately, there are a lot of approaches to tell if your driveshaft requirements replacing.

unbalanced

An unbalanced driveshaft can be the resource of unusual noises and vibrations in your vehicle. To correct this problem, you ought to make contact with a specialist. You can try out a variety of things to correct it, like welding and altering the fat. The subsequent are the most common approaches. In addition to the methods above, you can use standardized weights to equilibrium the driveshaft. These standardized weights are connected to the shaft by welders.
An unbalanced drive shaft typically creates lateral vibrations for each revolution. This sort of vibration is normally caused by a destroyed shaft, missing counterweights, or a foreign item trapped on the generate shaft. On the other hand, torsional vibrations take place twice per revolution, and they are induced by shaft period shifts. Last but not least, critical speed vibration takes place when the RPM of the drive shaft exceeds its rated capability. If you suspect a driveshaft difficulty, check out the pursuing:
Manually adjusting the imbalance of a push shaft is not the least difficult process. To keep away from the issues of manual balancing, you can choose to use standardized weights. These weights are fastened on the outer circumference of the push shaft. The operator can manually situation the weight on the shaft with specific tools, or use a robotic. However, handbook balancers have many drawbacks.
air-compressor

unstable

When the angular velocity of the output shaft is not continual, it is unstable. The angular velocity of the output shaft is .004 at ph = 29.5 and 1.9 at t = 1.9. The angular velocity of the intermediate shaft is not a problem. But when it truly is unstable, the torque utilized to it is way too a lot for the device. It may be a good notion to verify the pressure on the shaft.
An unstable travel shaft can cause a lot of sounds and mechanical vibration. It can direct to untimely shaft exhaustion failure. CZPT research the impact of shaft vibration on the rotor bearing program. They investigated the effect of flex coupling misalignment on the vibration of the rotor bearing system. They assume that the vibrational reaction has two elements: x and y. Even so, this approach has limited application in several scenarios.
Experimental results display that the existence of cracks in the output shaft could mask the unbalanced excitation traits. For illustration, the presence of superharmonic peaks on the spectrum is attribute of cracks. The presence of cracks in the output shaft masks unbalanced excitation traits that are not able to be detected in the transient reaction of the input shaft. Figure 8 displays that the frequency of the rotor increases at essential pace and decreases as the shaft passes the all-natural frequency.

Unreliable

If you are obtaining difficulty driving your auto, odds are you’ve got run into an unreliable driveshaft. This type of drivetrain can trigger the wheels to stick or not change at all, and also limit the total management of the auto. What ever the reason, these problems must be resolved as shortly as feasible. Here are some indicators to seem for when diagnosing a driveshaft fault. Let’s consider a nearer look.
The initial symptom you could recognize is an unreliable drive shaft. You might come to feel vibrations, or listen to noises underneath the vehicle. Depending on the result in, it could be a damaged joint or a damaged shaft. The very good news is that driveshaft repairs are typically comparatively affordable and take considerably less time than a comprehensive drivetrain alternative. If you are not certain what to do, CZPT has a guide to changing the U-connector.
1 of the most typical symptoms of an unreliable driveshaft is clanging and vibration. These appears can be brought on by worn bushings, unfastened U-joints, or broken heart bearings. This can result in extreme vibration and sound. You can also truly feel these vibrations by way of the steering wheel or the ground. An unreliable driveshaft is a symptom of a bigger dilemma.
air-compressor

Unreliable U-joints

A auto with an unreliable U-joint on the drive shaft can be hazardous. A poor u-joint can stop the car from driving properly and could even cause you problems. Unreliable u-joints are low-cost to exchange and you should attempt receiving components from good quality makers. Unreliable U-joints can lead to the vehicle to vibrate in the chassis or equipment lever. This is a positive sign that your car has been neglected in upkeep.
Changing a U-joint is not a complex job, but it requires special tools and a great deal of elbow grease. If you will not have the correct tools, or you happen to be unfamiliar with mechanical terminology, it is ideal to look for the assist of a mechanic. A professional mechanic will be capable to accurately evaluate the issue and propose an appropriate remedy. But if you never truly feel self-assured ample, you can replace your very own U-connector by following a handful of simple measures.
To ensure the vehicle’s driveshaft is not ruined, verify the U-joint for dress in and lubrication. If the U-joint is worn, the steel parts are likely to rub against every single other, creating use. The faster a problem is diagnosed, the faster it can be solved. Also, the more time you wait, the far more you drop on repairs.

broken generate shaft

The driveshaft is the element of the automobile that connects the wheels. If the driveshaft is ruined, the wheels might stop turning and the car may possibly sluggish down or cease relocating totally. It bears the weight of the vehicle by itself as well as the load on the street. So even a slight bend or split in the generate shaft can have dire consequences. Even a piece of unfastened metal can turn out to be a lethal missile if dropped from a vehicle.
If you hear a screeching sounds or growl from your vehicle when shifting gears, your driveshaft might be broken. When this transpires, harm to the u-joint and abnormal slack in the generate shaft can result. These situations can further injury the drivetrain, which includes the entrance half. You must exchange the driveshaft as soon as you discover any signs and symptoms. Following replacing the driveshaft, you can start hunting for indications of use.
A knocking audio is a indication of injury to the drive shaft. If you listen to this sound although driving, it could be because of to worn couplings, broken propshaft bearings, or damaged U-joints. In some situations, the knocking sounds can even be brought on by a destroyed U-joint. When this takes place, you could need to change the entire driveshaft, requiring a new 1.
air-compressor

Upkeep fees

The value of fixing a driveshaft varies extensively, based on the variety and lead to of the problem. A new driveshaft charges amongst $three hundred and $1,three hundred, which includes labor. Restoring a destroyed driveshaft can value wherever from $200 to $300, depending on the time necessary and the type of elements needed. Signs and symptoms of a destroyed driveshaft incorporate unresponsiveness, vibration, chassis sounds and a stationary car.
The very first point to contemplate when estimating the cost of restoring a driveshaft is the sort of motor vehicle you have. Some cars have far more than 1, and the areas employed to make them could not be compatible with other vehicles. Even if the exact same auto has two driveshafts, the destroyed kinds will price far more. Thankfully, many vehicle restore retailers supply totally free rates to repair ruined driveshafts, but be informed that such perform can be difficult and expensive.

China OEM Copper Aluminum Stainless Steel Carbon Fiber Turning Drilling Drive Shaft Core Titanium Cnc Centro De Usinagem Cnc Lathe Parts  with Best SalesChina OEM Copper Aluminum Stainless Steel Carbon Fiber Turning Drilling Drive Shaft Core Titanium Cnc Centro De Usinagem Cnc Lathe Parts  with Best Sales