A2 and D1 Flanged Lathe Spindle Runout Test Bars

Test arbor for mounting to turning-center and measuring run-out. Designed for A2-5, A2-6, D1-8 etc. lathe face mounting. Also available for flat 110 and 140 lathe face.

Extended drawbar clearance versions have additional depth at the taper needed for drawbar clearance on certain lathes.

PSC / PSK Spindle Runout Test Arbors

Made to the ISO 26623 Standard. Maximum runout error 0.003mm / 3 micron / 0.00012”. A certificate of accuracy is included. Storage are cases not included.

R8 Taper Spindle Runout Test Arbor

Standard R8 spindle runout test arbor with inch retention thread.

Runout <=0.003 micron (0.00012 inch)

Lathe Face Arbor Cases

Spindle Runout Test Arbor Instructions

One of the leading causes of tool breakage, part finish issues, tolerance control, and machine registration issues is excessive spindle runout.

Lathe Spindle Face Ring

Series 492.026 ring gauges are for lathe spindle face.

Ring only: order plug gauge separately (see series 492.028 or 492.228)

Steep Taper Spindle Runout Test Arbors

-Maximum runout error 0.003mm / 3 micron / 0.00012 inch
-Cylindricity ≤ 0.002mm / 2 micron / 0.00008 inch
-Carrying cases are not included (see below for case options).
-A certificate of accuracy is included. Traceable certificates available; contact us for details.
-Contact us for other lengths, tapers, and other special requirements.

Lathe Spindle Face Ring With Indicator Mounts

Series 492.126 ring gauges are for lathe spindle face.

Flat-nose Lathe Runout Arbors

PSC / PSK Taper Standard Ball-End Runout Test Arbors

Precision Spindle Analysis for 5-Axis Machining



Ensure the highest levels of accuracy and performance from your machine tools with the TAC Rockford PSC (Polygonal-Shank Taper) Ball End Test Arbor. Specifically designed for the verification of 5-axis machining centers, this precision instrument is essential for maintaining spindle health and positioning integrity.



Key Features:



PSC Taper Standard: Built to the ISO 26623 Standard for seamless integration and accurate seating in your PSC spindle.



5-Axis Positioning Accuracy: Primarily used for precisely checking the positioning accuracy of 5-axis spindles, especially the Rotary Tool Center Point (RTCP).



Spindle Runout Verification: Functions as a highly accurate runout test arbor to quickly and easily check that your machine spindle is running true.



Versatile Ball End: The precision ball end is ideal for establishing a consistent and repeatable touch-off point from the spindle face, a critical step for machine setup and calibration. It also provides a shorter alternative to standard runout bars when required.



Precision and Reliability: TAC Rockford's commitment to quality ensures a reliable instrument for periodic performance checks, verification after a machine crash, or installation/relocation.



Included Certificate of Accuracy: Each arbor comes with a certificate of accuracy to confirm its adherence to strict quality standards.