Collet Nuts

Collet Nuts come in two styles: slotted nuts and mini nuts. The slotted nut has six slots in the diameter of the nut that requires a special wrench. The mini-nut is also slotted but smaller than the regular ER nut. Mini-nuts use a different type of thread and are not interchangeable with regular slotted nuts. The mini-nut allows spindle to get closer to the work piece.

ER8 Mini-Nut = M10 X .75 Thread, Maximum Torque: 7 ft/lbs

ER11 Slotted = M14 X .75 Thread, Maximum Torque: 20 ft/lbs

ER11 Mini-Nut = M13 X .75 Thread, Maximum Torque: 14 ft/lbs

ER16 Slotted = M22 X 1.50 Thread, (I.D. Over 1/16″: 42 ft/lbs, I.D. Under 1/16″: 30 ft/lbs)

ER16 Mini-Nut = M19 X 1.00 Thread, Maximum Torque: 22 ft/lbs

ER20 Slotted = M25 X 1.5 Thread, (I.D. Over 1/16″: 59 ft/lbs, I.D. Under 1/16″: 24 ft/lbs)

ER20 Mini-Nut = M24 X 1.00 Thread, Maximum Torque: 25 ft/lbs

ER25 Slotted = M32 X 1.50 Thread, (I.D. Over 1/16″: 70 ft/lbs, I.D. Under 1/16″: 77 ft/lbs)

ER25 Mini-Nut = M30 X 1.00 Thread, Maximum Torque: 29 ft/lbs

ER32 = M40 x 1.50 Thread, (I.D. Over 1/16″: 100 ft/lbs, I.D. Under 1/16″: 100 ft/lbs)

ER 40 = M50 x 1.50 Thread, (I.D. Over 1/16″: 130 ft/lbs, I.D. Under 1/16″: 130 ft/lbs)