• All multiple spindle heads have a gear ratio of 1:1.
  • Tapping capacities are based on use of a spiral or point tap. The capacities are based on depth of tapping limited to 1.5 times the tap diameter.
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Model #

Offset Pitch

Erickson Collet Series

Chucking Capacity (inches/mm)

Type of Tap Holding

Applicable Synchro Tapper Model

OTC-100FU N/A 1.8701 inches (47.5 mm) N/A KTC N/A #3 to 1/2 (M3 to M12) N/A Floating #0.016 (0.4) N/A STB-L108U
OTD-160FU N/A 2.7165 inches (69 mm) N/A KTC N/A #3 to 5/8 (M3 to M16) N/A Floating #0.016 (0.4) N/A STC-P316U
OTD-220FU N/A 2.7165 inches (69 mm) N/A LTC N/A 1/2 to 7/8 (M12 to M22) N/A Floating #0.016 (0.4) N/A STC-P316U
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