CNC machining starts with your drawings
Explore the drawing, material, quantity and tolerance requirements behind CNC machining.
CNC process overview
Machining specification checklist
01
Machining process
02
Maximum part size
03
Tolerance range
04
Minimum order quantity
05
Finishing scope
06
Inspection records
Materials and finishes
01
Aluminum
02
Stainless steel
03
Brass
04
Carbon steel
05
Engineering plastics
06
Finishes
Part shapes and applications
Precision machine parts
Automation components
Instrument parts
Medical component geometries
Drive shafts
Equipment brackets
Quality and manufacturing responsibility
01
Critical dimensions
Important tolerances
02
Drawing revisions
Changes and versions
03
Inspection records
Document needs
04
Manufacturer role
In-house or partner process
Drawing preparation guide
01
2D / 3D drawings
STEP / STP and annotated PDF
02
Material and quantity
Grade and expected volume
03
Dimensions and tolerances
Critical features and finishes
04
Other needs
Target date and inspection
Quotation preparation steps
1
Prepare specifications
2
Check contact options
3
Technical review
4
Agree on terms
5
Decide next steps
Frequently asked questions
What drawings are useful? ＋
Prepare a 2D drawing with critical tolerances and a STEP/STP model when helpful.
What if I am unsure about the process? ＋
Start with geometry, material, quantity and intended use.
How should I describe quantity? ＋
Distinguish prototype volume from potential repeat orders.
How should tolerances be listed? ＋
Mark functional dimensions, threads, features and finishes.
Can I upload confidential drawings? ＋
No. CAD file uploads are currently disabled on this site.