R8 Spindle Runout Test Arbors

R8 Spindle Runout Arbor 260 mm X 1.25 inch Test bar

The largest causes of excessive tool wear and tool breakage are machine tool spindle runout and excessive slop or axial play. The spindle runout test bar can be used to test your CNC machine tools for precision accuracy and proper alignments. Test bars ensure a stable production environment and consistency when moving jobs from one machine to another.

Spindle Runout Testbars are easy to use and they fast way to verify your machine spindle is running properly. Check them after a machine has been crashed and take the proper steps to prevent unintentionally making scrap parts.

R8 Testbar Tolerance and Accuracy

• R8 are 0.003 micron or better
• Steel taper testbar arbors include certificates.

Retention knobs are not included. (use one from your machine, as they differ from one machine to the other.)

Spindle Runout Gauge Size	Dia.	Gauge Length	Part Number
R8 Test bar	31.75	260	K2325-1

Optional Test Bar Wood Storage Case
(fit to size) available. $125.00
(Part Number: K7500-S1)

Need a different machine taper test bar?

Can't find the right size spindle taper test bar? Contact us.

Runout Test Bars are available for all major machine tapers

• CAT 40 / CAT 50 / BT30 / BT40 / BT50 / DIN30 / DIN40 / DIN45 / DIN50 / DIN60 Testbar
• HSK-A/C/E A63 / HSKF63 / HSKA50 / HSK A100/C100 Testbar
• Capto Testbar
• KM 63 Testbar
• Morse Taper  MT1 / MT2 / MT3 / MT4 / MT5 / MT6 testbar
• R8 Testbar
• Straight Runout / A2 Chuck runout
• Lathe Turret Alignment / VDI Testbars