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CNC Machining

What is CNC machining?

CNC machining is a subtractive manufacturing process in which various precision cutting tools are used to remove raw materials to make a part or product.

Advanced software is used to control device specifications according to your 3D design.

Our team of engineers and mechanics program the equipment to optimize cutting time, surface finish and final tolerances to meet your specifications.

Surface treatment of CNC machining service

• Anodic oxidation – antiseptic and aesthetic

• Chrome plating – mirror-like hard coating

• Custom coatings and finishes – available on request

• Polishing – provided on request

CNC ability

We provide CNC machining services for a wide range of industries and applications. We use the latest CNC technology to manufacture high-precision machined parts.

We have 3 and 4 axis machines manufacturing components to a standard tolerance of +/ -0.005 mm. Stricter tolerances can be specified but may affect pricing and delivery.

Secondary operations such as tapping, marking, and surface treatment is provided to request an additional fee.

CNC Machining Service

• 3 axis Machining

• 4 axis Machining

• CNC turning

• Precision machining

• Small batch production

• Prototype CNC work


• Aluminum

• Brass/bronze

• Carbon steel

• Stainless steel

• Titanium

• Plastic

Surface treatment of CNC machining service

• Anodic oxidation – antiseptic and aesthetic

• Chrome plating – mirror-like hard coating

• Custom coatings and finishes – available on request

• Polishing – provided on request

What is CNC Turning?

CNC Turning is a manufacturing process in which bars of material are held in a chuck and rotated while a tool is fed to the piece to remove material to create the desired shape.

A turret (shown center), with tooling attached, is programmed to move to the bar of raw material and remove material to create the programmed result. This is also called “subtraction machining” since it involves material removal.

If the center has both tuning and milling capabilities, such as the one above, the rotation can be stopped to allow for milling out of other shapes.

  • The starting material, though usually round, can be other shapes such as squares or hexagons.
  • Depending on the bar feeder, the bar length can vary, affecting how much handling is required for volume jobs.
  • CNC lathes or turning centers have tooling mounted on a turret, which is computer-controlled. The more tools the turret can hold, the more options are available for complexities.
  • CNC’s with “live” tooling options can stop the bar rotation and add additional features such as drilled holes, slots, and milled surfaces.
  • Some CNC turning centers have one spindle, allowing work to be done all from one side, while other turning centers, such as the one shown above, have two spindles, a main and sub-spindle. A part can be partially machined on the main spindle, moved to the sub-spindle, and have additional work done to the other side of this configuration.
  • There are many different kinds of CNC turning centers with various types of tooling options, spindle options, outer diameter limitations, power and speed capabilities that affect the types of parts that can be economically made.

Is my part a good fit for CNC turning?

While a lot of factors go into determining if a part can be made most cost-effectively on a specific CNC turning center, some things we look at are:

  • How many parts are needed, short-term and long-term? CNC turning centers are generally suitable for prototypes to short-run volumes.
  • What is the largest OD on the part? For the CNC turning centers at Pioneer Service, the maximum OD for collected (bar feed-capable) parts is 2.5.”
  • Parts over 2.5″ OD are chucked individually, which depending on volume, can contribute to the price.
  • Parts under 1.25″ OD and medium to high volume may better fit the Swiss screw machines.
  • If a part can be made both on the CNC turning center and on a 32 mm Swiss Screw Machine, factors such as projected volume and lead-time are critical for making the best call on which to use.

When it comes to machining parts, there are a lot of variables. RJC can help you determine the best way to have your parts made. Contact us for help with your requirements.

CNC Machining Materials RJC Use

Aluminum – Gray (Aluminum 6061-T651)
– Gray (Aluminum 7075-T651)
Stainless Steel – Many Grades
Common Steel – Many Grades
Brass – Yellow (Brass 260 (70/30))
Titanium – Many Grades
ABS – Black (ABS)
– Natural (ABS)
-Flame Retardant – Black (ABS-FR)
Acetal -20% Glass Filled – Natural (Delrin 570)
-Copolymer – White (Acetal Copolymer)
-Homopolymer – Black (Delrin 150)
-Homopolymer – Natural (White) (Delrin 150)
-Static Dissipative – Tan (Tecaform SD)
CPVC – Gray (CPVC)
HDPE – Natural (White) (High Density Polyethylene)
LDPE – Natural (Low Density Polyethylene)
Nylon 6 – Black (Nylon 6)
– Natural (Nylon 6)
Nylon 6/6 – Black (Nylon 6/6)
– Natural (Nylon 6/6)
-30%GF – Natural (Nylon 6/6 30%GF)
PC – Black (Polycarbonate)
-PC – Clear (Polycarbonate)
– Translucent (Polycarbonate )
-20% GF – Black (Polycarbonate 20% GF)
PEEK – Natural (PEEK)
PEI – Natural (Ultem 1000)
– Black (Ultem 1000)
-30% GF – Natural (Ultem 30% GF 2300)
PET – Natural (White) (Polyethylene Terephthalate)
PMMA – Clear (Acrylic)
PP -Homopolymer – Black (Polypropylene Homopoly)
-Homopolymer – Natural (Polypropylene Homopoly)
PP -Copolymer – Natural (Polypropylene Copoly)
PPE + PS – Black (Noryl 265)
PPSU – Black (Radel R 5500)
PS (HIPS) – White (Polystyrene)
PSU – Natural (Polysulfone)
PTFE – White (Teflon)
PVC – Gray (PVC)
UHMW – Natural (UHMW)