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Frequently Asked Questions At PF CNC Machining  │ Answers To Expedite Your Metal & Plastic Part Cutting

This FAQ guide is based on machine shop and machining questions we are often asked.  This is meant to provide general information but there are exceptions to some of the CNC prototyping or manufacturing answers listed below.  If you think we haven’t addressed your subject, feel free to email or give us a buzz (404) 532-8188.

  • What materials do you machine?
    We machine aluminum, brass, copper, carbon steel, stainless steel, alloy or plastics like: Acetal, CPVC, Delrin®, Duratron, PAI®, ETFE, FEP, Fluorosint®, Halar®, Kynar®, Neoflon®, Nylatron®, Nylon, PCTFE, Peek, Polyimide, PPS, Polyurethane, PVC, Rulon®, Ryton®, Semitron®, Techtron®, Tefzel®, Torlon®, Turcite®, UHMW, Ultem®, Vespel®, Kel-F®
  • What kind of material do you stock?
    We do not stock material we do order the material as needed.
  • What kind of machines do you have?
    We have vertical machining centers and horizontal turning centers with spindles used for tight-tolerances milling and turning, such as tool & die work.
  • I need a CNC machining quote; what kind of machining services do you offer?
    We do the following services: milling, turning, drilling, threading, tapping, part design, prototyping, reverse engineering, low volume or one-off part machine runs, modification of an existing part, material sourcing assistance, limited material warehousing and parts dispatching. To receive a quote, just send a CAD file via email to
  • What are your hours of operation?
    We are available Monday through Friday between 8:30 am and 5:30 pm EST. You may always email your CAD (computer-aided design) files along with the necessary information to
  • Which industries use your CNC machine shop services?
    We serve the architectural, engineering, design, food processing, hospitality, education sector, entertainment, advertising, plant operations, repair and service, retail and of course, we are open to extend our machine shop assistance to more industries.
  • I'm looking to create several prototypes and I have my CAD drawings exported to DXF format. Is this sufficient for proceeding?
    Yes in most cases, especially with better software like AutoCAD®.
  • Do you use SketchUp?
    Exporting a DXF/DWG from SketchUp is ok, but please be aware that the arcs and circles created in that software would be segmented when brought into our CAM software. When the arc/lines are segmented the material will be cut segmented as well and not as a true arc or circle unless we re-draw the entity.
  • What modeling software do you prefer to use?
    Inventor, SolidWorks™, and Solid Edge. For the more inexpensive modeling software consider Rhino or Autodesk® Fusion360™ which is a robust, modeling software with huge save/export options. If you find yourself working with companies that use CNC machining centers, turning centers, routers and 3D printers a lot, you might want to make a switch.
  • What type of files do you accept?
    We accept different computer drawing file formats: ​ -For SolidWorks users, SLDPRT (.sldprt) when sending a single part and SLDASM (.sldasm) when sending an assembly of parts. Generic parasolid documents X_B (.x_b) or X_T (.x_t) will work equally well -For Inventor users, IPT (.ipt) when sending a single part and IAM (.iam) when sending an assembly of parts. Generic parasolid documents X_B (.x_b) or X_T (.x_t) will also work just fine -STEP (.step) or STP (.stp) formats are ok, but are inferior to the format types above -IGES (.iges) and IGS (.igs) are ok but inferior to the formats above -For Autocad users, DXF/DWG files will work fine
  • Do you do CNC machining for individuals or just companies?
    We work with both individuals and manufacturing companies.
  • Do you do work on site?
    All work is done in our shop at this time.
  • What is your lead time?
    This is a situation-specific topic to be discussed once we have a clear understanding of what needs to be done. We work on a first come first serve basis therefore current work load will factor in. After the receipt of a purchase order in writing, file completed, and materials are available, we could say five business days to six weeks lead time. This will be subject to the complexity of the parts and quantities of the parts ordered.
  • Can you provide finishing for my existing or custom parts?
    PF CNC machining does not supply finishing options in our shop. However we have vendors we do outsource to fulfill your powder coating, anodizing, heat treating, plating, abrasive blasting, metal brushing, tumbling and grinding needs. We are not a work brokerage and everything we promote that we do, is in fact done in-house. Other companies claim to do everything in their shop. If we can’t do what you need, we’ll tell you upfront that we don’t. We will point you in the direction of how you’d want to do it and who can do it for you, if possible.
  • Do you accept small quantity jobs?
    We are geared toward production but we gladly accept small quantities. You may order one part or thousands. We do view each order individually therefore larger orders will automatically receive a price reduction. We do have a minimum dollar amount per order.
  • How much is your minimum dollar amount per machining job?
    We do have a $300.00 USD minimum order to cover basic CAD file prep and physical setup.
  • Do you accept credit cards?
    For your convenience we do accept cash, company checks and all major credit cards.
  • Can you make a replica of a part I have?
    We can duplicate a part in certain instances but we would have to see it and determine so. Feel free to send us a picture of your part via email. If you are in our area, you are welcome to set up an appointment to bring us your part. If you are outside our area then just mail the part to us.
  • What places are you able to ship to?
    We offer Continental US Shipping
  • Can you modify a part that I have?
    We would need to see it.
  • Do you do manual machining or just CNC machining?
    We do both types of machining; however a drawing needs to exist in order to machine the part no matter which process we use.
  • I do not have a CAD drawing; will you still work with me?
    If you do not have a CAD drawing, consider our relationship as client designer collaborative interaction. We would have to create a CAD drawing which would generate an upfront designer fee. For a couple of pieces where there is no file available, it could get expensive because of the time required to get to where we're actually making the parts.
  • Why do you need a CAD drawing to cut a simple rectangle, circle or letters?"
    Even the simplest of shapes require a CAD drawing. That CAD drawing will be imported into CAM (computer-aided manufacturing) software. From that drawing, we would utilize the geometry to apply toolpath to all entities intended to be machined. We also want to avoid the liability of cutting something that wasn’t approved. A CNC machine is a computer-controlled cutting machine used in the manufacturing world. It involves the use of computers to control the machine tools via G-code. Therefore, only a CAD drawing could be used in the CAM software that both gives us a visual representation and controls the machine.
  • What is G-code?
    G-code is a universal name for the most commonly used numerically controlled (NC) programming language. This language is used by CNC programmers directing the machine tool to execute the desired actions and movements in order to cut precision parts.
  • Why do you need to design and machine a workholding component to machine my parts?
    CNC machines move at a very high rate of speed combined with a massive amount of torque. Maintaining the desired fixed position throughout the force of cutting ensures repeatable results. If the part moves while being machined, the high tolerances of the part will be compromised. Therefore machining a “jig” or workholding fixture may be required in order to complete the part.
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