Holder Type |
Typical T.I.R. |
Accuracy Level |
Standard ER Collet |
0.0004" – 0.0012" |
Good |
High Precision Collet |
≤ 0.0002" |
Excellent |
Hydraulic |
≤ 0.00012" |
Superior |
Heat Shrink Holder |
≤ 0.00012" |
Superior |
Milling Holder |
0.0001" – 0.0002" |
Excellent |
Why does T.I.R. matter? Total Indicated Runout (T.I.R.) measures how accurately a cutting tool rotates around its true centerline. Excessive runout causes uneven flute loading, poor surface finish, shortened tool life, increased vibration, and premature spindle wear.
In woodworking applications, excessive T.I.R. is often responsible for:
General Woodworking< 0.001"
Compression Tooling< 0.0005"
Finish Routing< 0.0003"
High-Speed CNC Routing< 0.0002"One thing
Published T.I.R. values are typically measured at the holder nose under controlled conditions. Actual runout at the cutting edge may vary based on spindle condition, holder quality, collet condition, tool shank tolerance, assembly practices, and tool projection. Evaluate your specific conditions...
In woodworking applications, excessive T.I.R. is often responsible for:
- Premature failure of compression spirals
- Poor edge quality in melamine and laminates
- Increased tool breakage
- Reduced spindle bearing life
- Inconsistent part quality
- Standard ER Collets provide a versatile and economical solution for general routing applications.
- Precision ER Collets offer improved concentricity and are ideal for high-speed CNC routing and finish cutting.
- Hydraulic Holders provide exceptional vibration dampening and surface finish quality.
- Heat Shrink Holders deliver maximum rigidity, balance, and repeatability for demanding high-speed applications.
General Woodworking< 0.001"
Compression Tooling< 0.0005"
Finish Routing< 0.0003"
High-Speed CNC Routing< 0.0002"One thing
Published T.I.R. values are typically measured at the holder nose under controlled conditions. Actual runout at the cutting edge may vary based on spindle condition, holder quality, collet condition, tool shank tolerance, assembly practices, and tool projection. Evaluate your specific conditions...