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1.High speed, 2.light duty, 3.Heavy duty, 4.Self-tighten Drill Chuck, 5.For possessing high griping power - details see: https://www.machineto.com/keyless-drill-chuck-light-duty-10145183

Self-tighten Drill Chuck

1.Suitable for medium,heavy duty drilling use;

2.For milling machine,lathe ,drilling machine,wood working machine;

3.High speed drilling can be performed for possessing high griping power.

3121A&3121B Series Morse, Jacquard Short Taper Stock

Item No. Capacity Tapering Hole Number Taper Mertic Inch 3121-04 0.3~4 1/64~5/32 JT0 2°49'24.7" 3121A-06 0.5~6 - B10 2°51'26.7" 3121B-06 - 1/64~1/4 JT1 4°24'53.1" 3121A-08 0.5~8 - B12 2°51'26.7" 3121B-08 - 1/64~5/16 JT2 4°40'11.6" 3121A-10 1~10 - B12 2°51'26.7" 3121B-10 - 1/32~3/8 JT2 4°40'11.6" 3121A-13 1~13 - B16 2°51'41.0" 3121B-13 - 1/32~1/2 JT33 3°38'13.4" 3121A-16 1~16 - B18 2°51'41.0" 3121B-16 - 1/32~5/8 JT6 2°58'24.8" 3121A-20 5~20 - B22 2°52'31.5" 3121A-20 - 3/16~3/4 JT3 3°3'3"

3121C Series Female Thread Stock

Item No. Capacity Female Thread Mertic Inch 3121C-06 0.5~6 1/64~1/4 M10X1 3/8"-24UNF 3121C-08A 0.5~8 - M10X1 3/8"-24UNF 3121C-08B - 1/64~5/16 M12X1.25 1/2"-20UNF 3121C-10A 1~10 - M10X1 3/8"-24UNF 3121C-10B - 1/32~3/8 M12X1.25 1/2"-20UNF 3121C-13A 1~13 - M12X1.25 1/2"-20UNF 3121C-13B - 1/32~1/2 M12X1.25 1/2"-20UNF 3121C-16A 1~16 - M12X1.25 1/2"-20UNF 3121C-16B - 1/32~5/8 M16X1.5 5/8"-16UNF