Accusize ER20 Collet Chuck Extension Rod, 3/4in Straight Shank, 3.93in OAL

Accusize ER20 Collet Chuck Extension Rod, 3/4in Straight Shank, 3.93in OAL

• EXTEND YOUR REACH ON ER20 SETUPS: Compatible with ER20 collets for tool diameters from 0.04-0.511in. The added length reaches milling, drilling, tapping, and countersinking work beyond what a standard holder can reach on CNC and manual machines
• BUILT TO OUTLAST DAILY MACHINING: Alloy steel construction hardened to HRC 56-60 resists wear from constant tool changes and cutting loads. The added hardness keeps the collet interface tight instead of wearing loose after repeated use
• HOLD TRUE UNDER LOAD: Precision-ground construction keeps total indicated runout at 0.0002in or better on the holder itself, supporting accurate, repeatable tool seating. Final cutting-edge runout also depends on the spindle, collet, and tooling in use
• KNOW YOUR EXACT FIT: 3/4in straight shank, 2.50in shank length, 3.93in overall length. Hex collet-nut diameter (D): 1.34in; holder flat-to-flat dimension (H): 0.90in; bottom internal thread: 3/8-16
• BUILT FOR THE FULL RANGE OF METALWORKING: Machinists, engineers, and hobbyists rely on this rod for precise, repeatable reach on steel, stainless steel, and alloy workpieces. The same extension performs consistently whether the job is a one-off or a production run