Key-Type Chucks for General Purpose Machining -- For Use With All Blackalloy™ Series 150 & 250 Drill Units

0-1/4" and 0-3/8" capacity for #1 Jacobs Taper Spindles and 3/8-24 Threaded Spindles;
0-3/8", 0-1/2" & 3/32-5/8" capacity for #2 Jacobs Taper Spindles & 1/2-20 and 5/8-16 Threaded Spindles



Key Type Chuck Selection Chart
Chuck Size

A

 B C

D

 E F

TIR (Max) See Note

 Fig Blackalloy P/N
0-1/4
0-6.5mm 		1JT .84 1.12 .656 1.54 1.92 .004 @ 1    1 6121J1
0-3/8
0-10mm		 1JT 1.00 1.43 .656 2.02 2.49 .004 @ 1.5 1 6390J1
0-1/4
0-10mm		 3/8/24 .84 1.12 .63 1.571 1.95 .004 @ 1    1 6121TH
0-3/8
0-10mm		 3/8/24 1.24 1.24 .63 2.17 2.81 .004 @ 1.5 1 6390TH
5/64-1/2
2-13mm		 3/8/24 1.25 1.79 .63 2.41 3.11 .004 @ 1.5 1 6500TH
0-3/8
0-10mm		 1/2-20 1.00 1.43 .63 2.02 2.49 .004 @ 1.5 1 6390H5
0-3/8
0-10mm		 2JT 1.24 1.67 .875 2.17 2.81 .004 @ 1.5 1 6390J2
0-1/2
0-13mm		 2JT 1.56 2.04 .875 2.74 3.56 .004 @ 1.5 1 6500J2
3/32-5/8
2.5-15.8mm		 5/8-16 1.75 2.30 1.12 2.85 3.80 .006 @ 1.5 1 6625-H6
Dimensions in Inches


Notes
TIR @ Distance from Nose
JT = Jacobs Taper #1 or #2
3/8"-24 = Internal Thread
1/2"-20 = Internal Thread
5/8"-16 = Internal Thread
Keys Included

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Blackalloy Company of America • 21 Summit Avenue • Elmwood Park, NJ 07407

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