Frequently Asked Questions

What does ‘CNC’ machining stand for?

CNC stands for ‘computer numerical control’. In manufacturing, a computer programs a milling machine to remove layers from a stock material resulting in a precise and accurate machined part.

What is CNC and precision milling?

CNC and precision milling is a manufacturing technique in which a computer-controlled milling machine is guided by repetitive and extremely accurate movements to mill down a stock material into a sophisticated and precise machined component.

What industries use CNC milling?

Because of how versatile machining and milling machines can be, many industries benefit from their applications and results, such as:

  • Medical device
  • Aerospace
  • Defense
  • Photonics
  • Electronics
  • Transportation industry
  • And much more…

What types of parts can Criterion Tool make?

Criterion Tool has various machines to complete most projects. We work with multiple materials such as aluminum, brass, hastelloy, inconel, nitinol, non-ferrous casting, PEEK, plastics, stainless steel and titanium. Our Swiss turning capabilities can make projects from .04” to .875” in diameter and our CNC milling machines can manufacture parts from .25” sq. to 17”x 22”x 17”.

What does precision and quality inspection look like at Criterion Tool?

After more than 65 years of experience, precision is all we know. We have a certified Quality Assurance program and offer precision inspections and documentation services. Criterion Tool has multiple points of precision inspection built into our manufacturing processes including a Global Advantage 5x5x5mm CMM with TESTASTAR-sm probe which uses PC-DMIS and SPC software. We house the OASIS – Optical Automatic Smart Inspection System, which allows inspectors to measure multiple dimensions on a part simultaneously.

We also own several Keyence measuring systems which can measure up to 99 dimensions on up to 100 parts at the same time.

Does Criterion Tool require a minimum?

No. We can complete projects from 1 to 100,000.

What is a typical lot size at Criterion Tool?

We see a typical lot range from 25 – 5,000 pieces. We do offer volume pricing as the lot size increases. Our prototypes incur a higher per piece cost due to the amount of personalized time it takes to create a first-run project.

Do you have any “green” measures?

We take our commitment to the environment seriously. We practice in-house recycling of materials and our office made a transition into paperless documentation – saving up to 44 trees every year. You can read about the transition here on our blog.

Do you charge for documentation?

We do not currently charge for documentation such as Certificates of Conformance and final inspection reports. 

Do you have any tooling charges?

We have one-time tooling charges based on the project. 

Can you expedite a project?

Absolutely! We understand that outside factors can play havoc on a timeline. Our precision machine shop is perfectly equipped to handle expedited projects. Additional fees may be incurred. We will do everything within our control to ensure your project can be completed within your deadline.

What are your main office hours?

Our office is open from 8:00 am to 4:30 pm EST Monday through Friday.

What are your shipping/receiving hours?

Shipping and receiving is open from 8:00 am to 4:30 pm EST Monday through Thursday. Limited shipping and receiving is available on Friday.

Where is Criterion Tool located?

We are located at 5349 West 161st Street, Brook Park, Ohio 44142.