About Us

TMD Machining, INC is a privately owned manufacturing shop located in Plainwell Michigan. TMD was established in 1995 to help meet the increasing need for on-time, quality, and precision machined material. TMD focuses on precision manufacturing, lap fitting, hydraulic testing, & pneumatic testing. Our expertise is with: Spools & sleeves, valves & complex assemblies.

Quality Mindset

We are AS9100 and Nadcap certified on all of our processes. Quality isn't an afterthought in our process, it is developed in parallel with the machining process to create the most robust inspection plan possible. With the use of our APQP process, PFMEA's, MSA's and Control Plans, we deliver a perfect part on time and in budget.

TMD Facilities

– Total of 120,000 sq ft climate controlled manufacturing facilities

– 25,000 sq ft assembly and test facility

– NADCAP accredited EDM and Heat Treat facilities

– Located on 11 acres in Plainwell Michigan USA

– 145 employees, 3 shifts

Company Overview


• Management team: 100 yrs combined aerospace experience

• Hone, Lap, Match fitting: over 200 yrs combined experience

• Engineering / Technical resources include:

– 5 Degreed Industrial & Mechanical Engineers

– 2 CAD Design Specialists

– Valve Assembly technicians

– Test technicians


Manufacturing Engineering

Project Management

Design and Development

Hydraulic Design & Development 

Solenoid Valve Design 

Stress and Fatigue Analysis

FEMM Magnetic Modelling

Thermal Analysis

Contact Us

Take a minute to look at Darby Metal Treating our sister company!

Providing Service for your Everyday Heat Treating, Grinding and Straightening Needs

Proudly serving the Following Industries...

Aerospace    Automotive    Medical    Tool & Die

Find out more