Headquartered in China, Wonder has more than 10 years of custom CNC manufacturing experience. We are able to offer custom CNC machining services and laser cutting services from design, rapid prototyping, and complex parts geometry to low or large-volume production. We are always committed to producing high-quality machined parts and laser cutting parts in line with your budget and lead time demand.

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137 1219 8704

  • 1. The reason for the roundness of turning parts?

    (1)The thread of the chuck flange and the spindle is loose or the chuck positioning surface is loose;

    (2) The workpiece hole wall is thin and the clamping deformation:

    (3) The spindle bearing clearance is large, and the clearance between the outer diameter of the spindle sleeve and the box hole is large, or The roundness of the main journal is out of tolerance.

  • 2. What is the factor of out-of-tolerance in turning?

    There are mainly eight aspects:

    (1) Blank bending; 

    (2) The front and back centers are unequal in height or center offset.;

    (3) Improper top tightening force;

     (4) The axis of the main shaft of the lathe and the guide surface of the bed are not parallel in the horizontal plane;

    (5) The distance between the tool tip and the support of the follower tool post is too large; 

    (6) The clamping rigidity of the workpiece is not enough; 

    (7) The tool is worn out or the tool shaft is too thin in one feed, causing the tool to be cut (hole alignment); 

    (8) Deformation caused by turning stress and turning heat.

  • 3. Tolerance Error Reason for cnc turning taper and size

    (1) The tip of the turning tool is not aligned with the axis of the workpiece

    (2) There is an error in the corner of the tool post or the offset of the tailstock.

  • 4. Why is the surface roughness of the product too large?

    It is often due to the following three reasons:

    (1) Poor lubrication, poor filtration of cutting fluid or improper selection.

    (2) The metallographic structure of the workpiece is not good.

    (3) The tool is poorly sharpened or the tool tip is higher than the axis of the workpiece.

  • 5. Why is there a chaotic ripple phenomenon?

    The reasons are:

    (1) The axial movement of the main shaft is large or the main shaft bearing is seriously worn.

    (2) The chuck flange and the E-axis are loosely matched, the bottom surface of the square tool post and the tool post slide plate are in poor contact, and the gap between the medium and small slide plates is too large.

  • 6. The causes of fixed-distance ripples repeated occurrence

    Generally it is caused by three reasons:

    (1)) The meshing gap of the transmission gear of the feed system is abnormal or damaged.

    (2) The gap between the pressure plates on the longitudinal sides of the large slide plate and the bed rail is too large.

    (3) The light bar is bent, and the coaxiality of the hole supporting the light bar and the light bar is out of tolerance or the bar is not parallel to the bed guide rail.

  • 7. Your machining line and angle tolerances?
    Linear tolerance range: within ±0.02mm; Angle tolerance range: ±1°; Roundness: within 0.005mm.
  • 8. What testing equipment do you have?
    We have 2D coordinate measuring machine, 3D coordinate measuring machine, altimeter, caliper, micrometer, roughness meter, salt spray tester, CCD automatic tester, contour projector
  • 9. How about your CNC machining production capacity?
    Different product structures have different production and processing capabilities. Now each part can produce 15,000 pieces
  • 10. How to choose the pressing method of the tool bar?
    There are several ways to press the tool: P is to clamp with the central cylindrical pin of the blade, and the clamping methods include lever type, eccentric type, etc. Moreover, the products provided by various tool vendors do not necessarily include all clamping methods, so please refer to product samples when choosing. Each clamping method is suitable for different forms of blades. For example, non-porous blades are commonly used for upward pressure (C type), and ceramic, cubic boron nitride and other blades are commonly used for this clamping method. The D and M models have reliable clamping and are suitable for occasions with large cutting forces, such as harsh processing conditions, rough machining of steel, and processing of short chips such as cast iron. P-type rake face is open, which is conducive to chip removal. Generally, medium and light cutting can be used. The S-type structure is simple and compact, and has no resistance to chip removal. It is a clamping method for counterbore inserts. It can be used with front inserts and is suitable for light cutting and small hole machining.
  • 11. Which compression method is the most reasonable?
    No kind of compression method is the most reasonable. It depends on the processing material and the occasion, and it must be combined with your company's inventory to meet the drawing requirements and save the cost of the tool is the most important.
  • 12. How to choose the cutting tool bar?

    Pay attention to the following points:

    (1) Workpiece material and shape;

    (2) Machine tool;

    (3) Cutting edge related to the central axis of the part;

    (4) Type of blade and chip breaker;

    (5) Carbide grade and coating Layer;

    (6) Other cutting conditions that affect tool life.

  • 13. How to choose the cutting knife seat and board?
    The cutting blade is determined by the size of the blade required by the drawing; and the cutting blade seat is determined by the fastening of the blade and the machine tool.
  • 14. Relationship between cutting rake angle and roughness
    The rake angle can sharpen the cutting edge, make cutting more brisk, and reduce cutting force and cutting heat. However, if the rake angle is too large, the strength of the cutting edge and the cutting edge will decrease, and the heat conduction volume of the tool will decrease, which will affect the service life of the tool. The size of the rake angle also has a certain influence on the surface roughness, chip evacuation and chip breaking. The strength and hardness of the workpiece material is low, and the rake angle should be larger, and vice versa. Therefore, the rake angle will directly affect the surface roughness.
  • 15. What cnc machine models do you have?
    Automatic lathe, Citizen swiss-type, CNC lathe, 5-axis CNC machine
  • 16. What is your CNC turning tolerance?
    Automatic lathe: ±0.01mm; Citizen swiss-type: ±0.005mm; CNC lathe: ±0.01mm.
  • 17. What certificate do you have?
    ISO9001 quality system and SGS On-site factory audit, machining patent certificate.
  • 18. Are you a factory or a trading company?
    Wonder is a hardware precision parts processing factory. Welcome to visit our factory.
  • 19. Is the sample available? free?
    Samples are available and some are free.
  • 20. Please send me your cataloge?
    We mainly make customized products according to customers' drawings or samples, so we don't have cataloge. Each customer's needs are different. We can provide company profile.
  • 1. What are the frequently used metal materials?

    Aluminum 5052, AL5083, AL6061, AL6063, AL7075, etc

    Brass C12000, C26000, C27200, C28000, C36000, C37700, C38500, etc

    Stainless Steel SS304, SS304L, SS316, SS316L, SS400, SS430, SS430C, etc

    Steel: 1213, 12L14, 1215, 4140, 4340, Q235, Q345B, 20#, 45# SKD61,SKD11,HSS M2, etc

    Bronze: C51000, C52100, C54400, etc

    And some other metal materials like Titanium, Beryllium Copper, Tungsten, Kovar, Inconel, Monel, CuW, etc

  • 2. What are the frequently used plastic materials?
    ABS, Delrin, Nylon, Peek, UHMW, PC, PETP, Ultem, etc
  • 3. Can we sign a non-disclosure agreement?
    Yes, we will never disclose customer information to anyone else, and we have a software confidentiality system.
  • 4. What is the MOQ of your company?
    The MOQ of our company is 1 piece.
  • 5. How to get a quick quotation from you?

    In order to quote quickly, please provide details as below:

    3d files with .step /.stp . /.igs/.x_t format.

    2d files marked with critical dimensions and other requirements.

    quantity and surface finish.

    Generally we send quotation within 24 hours after having all related details clear.

    If you have samples in hand, it is also ok to quote after sending us a sample.

  • 6. How to confirm your quotation?
    You can confirm it by phone, fax or email.
  • 7. What is your process after I placed an order with you?
    Firstly the 3d files and BOM will be given to programming engineers to program the CNC tool path. Secondly our engineers will take the BOM and tool path list to CNC Machining Center. Thirdly the prototype will be delivered to post finish center to clear the burrs after CNC Machined. Finally if you need effects like painting silk-screen anodizing sandblasting plating drawbenchlaser-etching etc. we can make it as your requirements.
  • 8. What is the lead time of making some samples?
    Lead time depends on the complexity and qty. Specific lead time will be attached with quotation sheet after careful evaluation of your case. We can also coordinate and do some quick turn projects if short lead time is required.
  • 9. How do you guarantee quality?

    Inspection by machinist himself who is responsible for a specific part machining.

    First article part inspection by QA.

    IPQC patrol inspection during production.

    PQC inspection before shipping according to sampling inspection standard for large quantity production. And for small quantity, 100% full inspection.

    Material Certificates and outgoing inspection reports could be provided.

    Our factory sets full and advanced inspection instruments such as CMM, projector, height instrument, industrial microscope, micrometer, calipers, thread gauges, pin gauges, block gauges, etc. so as to inspect all details on drawings and confirm quality is good and issue the ourgoing reports accordingly.

  • 10. The payment condition in Wonder?

    - Sample / trial order with total order amount less than USD1000, Paypal is acceptable.

    ​- General / bulk order with total order amount more than USD1000, we accept 50% TT / Wire Transfer in advance before production, and 50% TT / Wire Transfer before shipment.

  • 11. What if the parts received with damage?
    If mistake is caused by our side, we will remake for free or refund immediately.
  • 12. How make our business long-term and good relationship?
    We keep good quality and competitive price to ensure our customers benefit.Furthermore, we respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
  • 13. How can I get a sample for quality check?
    After quotation, if needed, you can ask for samples to check quality. We are willing to provide with sample for quality and function testing.
  • 14. Some other details are as below to clarify

    Packing:Multiple packing materials such as pp bags, foam, wood crates etc to be chosen to guarantee Safe Packing which is suitable for long distance transportation. If you have special packing requirement, please let us know in advance.


    1) 0-100kg: express & air freight could be a good choice.

    2) >100kg: shipping by sea is better for saving cost. It depends.

    Trade Terms:

    EXW, FOB, CIF, as per customer’s requirement.

  • 15. The smallest part or panel that can be cnc machined
    The minimum sheet metal part that can be vacuum-chucked without clamps is 5″ x 5″. Vices can be used for smaller parts. Please email [email protected] for more details.
  • 16. how large of a part or panel can be cnc machined ?
    The maximum size sheet metal parts we are able to mill in a single setup is 4′ x 8′. The maximum size bar stock that we are able to mill in a single setup is 26″ x 16″ x 12″.
  • 17. What are stocked materials for machining?
    We stock a variety of plastic and metal materials from ABS, nylon, PC, and PP to stainless steel, aluminum, copper, and brass. See a full list of more than 40 stocked materials for milling and turning. At this time, we do not accept customer-supplied material for machining.
  • 18. What is the tolerance you can guarantee?

    General tolerance of our machines are as below:

    CNC Milling tolerance: +/-0.01mm

    CNC turning tolerance: +/-0.01mm

    5 Axis Machining tolerance: +/-0.005mm

    Precision grinding tolerance: +/-0.005mm

    EDM machining tolerance: +/-0.005mm

  • 19. What surface finishes can you do?
    Some Frequently used surface finishes are Anodizing, Oxide, Nickel Plating, Chrome Plating, Gold / Silver Plating, Powder Coating, Zinc Plating, PVD Coating, Passivation, Heat Treatment, Electrochemical machining, Brushing, Polishing, Sandblasting, etc.
  • 20. Is it possible to customize the logo?
    Yes,We can support silk printing, pad printing, laser engraving, etching, cnc machining engraving.

Still stuck ask directly.

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