0014

Custom Machined Parts

What are Plastic Custom Machined Parts?

Plastic custom machined parts refer to components made from plastic materials that have undergone machining processes to achieve specific shapes, dimensions, and features. Machining is a subtractive manufacturing process where material is removed from a stock shape (rod, sheet, tube, cylinder etc) to achieve the desired form. 

The machining process involves using tools like lathes, milling machines, routers, or CNC (Computer Numerical Control) machines to cut, shape, and finish the plastic material according to precise specifications.

Benefits of Machining compared to other plastic part manufacturing

  • No Tooling – injection moulding requires expensive tooling where the design and tool making lead-times are long (3-12 months). 
  • Short Lead-times – generally parts can be made in days or weeks. 
  • No Minimum Order Quantity (MOQ) – machining is suitable for 1 off production, as well as volume on going production. 
  • Cost Effective – with no tooling and minimum set-up costs, these costs are eliminated (or minimised). 
  • Flexibility – design or dimensional changes are possible without costs incurred due to tooling changes in injection moulding. 
  • Compared to 3D printing (additive manufacturing), the unit production times are short, and less costly. 
  • High Quality Materials – the engineering characteristics of stock shape (Rod, sheet, tube etc) plastics are generally superior to other plastic part manufacturing techniques. 

Dotmar has qualified engineers and machinists that can provide direct support with custom machined plastic parts and designs. 

27

MATERIAL SELECTION CONSIDERATIONS

Material selection is a critical consideration when choosing a plastic bogie wear part, as it directly impacts the performance, durability, and maintenance requirements of these components. Here are some key material selection considerations for plastic bogie wear parts:
Material Properties and Characteristics

The material must have the appropriate properties and characteristics for the final application, ensuring that the desired performance is achieved.

Availability of Stock Shapes (rod, sheet etc)

Even though most materials are manufactured in most stock shapes, the size and/or thickness for sheets or diameters for rod that are manufactured and therefore available, will contribute to the possibility of a material being selected for a given part.

Machinability of materials

Various materials behave differently when they are machined, which will influence. 

  • The ability to achieve a desired surface finish. 
  • The ability to meet dimensional tolerances.
  • The ability to meet and maintain straightness, which is influenced by internal stresses, that can relieve during a machining process.
Machining Techniques

Some materials have characteristics that dictate what machining technique is required. A good example is a large diameter Ertalon 6PLA rod that is bored. Due to internal stresses that cannot be avoided during the casting process, progressive boring techniques are required. This is the case for all large diameter cast nylons. 

It is also important to consider if influences such as heat generated from a machining process will affect the materials properties and/or surface finish. 

Regulatory Requirements

Does the application have regulatory requirements such as medical cleanliness.

Other considerations

At times there may be other considerations such as chemical resistance or influences of machining coolant.

Contact us

Dotmar Engineering Plastics stands poised to address your unique challenges. Harness our expertise for bespoke engineering plastic solutions tailored to your specifications.

contact-team

Insights

25 Nov 2024 Comparing the technical and commercial benefits of Polystone P CubX for rectangular plastic fabricated tanks and vessels

02 Sept 2024 Cooling Tunnel for Hot Filling Line

25 Nov 2024 Sentinel Boats: Pioneering Defence Durability with Polystone PG100 HDPE

08 Dec 2024 Christmas Closure 2024

08 May 2025 Why Local Manufacturing is the Smarter Choice in 2025

07 Apr 2025 Dotmar Injection Moulding

Dotmar Victoria Receives PACCAR Kenworth Quality Award

09 Feb 2025 Water Absorption of Nylons Pros, Cons and Busting Myths

14 Jan 2025 Tips for Turning and Drilling Engineering Plastics

15 Nov 2024 Significantly Reduce Your Hangup and Carryback to Optimise Your Mining Operations

10 Oct 2024 Why use Engineering Plastic Bearings and Bushes?

29 Sept 2024 Plastic Abbreviations

29 Sept 2024 Plastics Properties Table

29 Sept 2024 Plastics Designing for Thermal Expansion

20 Oct 2024 Antistatic vs Static Dissipative Plastics

02 Sept 2024 Chain Tension-Right, or Short Chain Life

27 Sept 2024 REXNORD curve system with 1540 series MatTop

02 Sept 2024 Polystone CubX A Revolution in Rectangular Thermoplastic Tanks

02 Sept 2024 Plastic Technical Tip-Water absorption in Nylon

02 Sept 2024 Performance Pyramid

11 Oct 2024 UHMWPE-Why Does Molecular Weight matter?

22 June 2025 HDPE vs PP vs PVC

25 Nov 2024 Rochling-Reloop: Leading the Way in Sustainable Plastics

27 Sept 2024 Low Friction Wear Pads

Conveyor Products & Total Solutions for the Food and Beverage Processing & Packaging Industries

03 Dec 2024 Resistawear: Low Friction and Abrasion Resistant Tape

Plastic Machine Guarding Managing the Risks of Plant in the Workplace

HDPE Checkerplate Transom

Subscribe

To receive latest news and promotions