Compact Erickson™ Type Collet Chucks & Compressible-Type Collet System for Precision Machining– for use with Blackalloy Drill Units Series 150 & 250

  • Precision machined Erickson™ type Collet Chucks mount directly to all Blackalloy Drill Units equipped with #1 & #2 Jacobs Taper Spindles and 5/8-16 Threaded Spindles.
  • Three Collet Chuck sizes are available: 1/4" capacity for #1 Jacobs Taper Spindles, 3/8" & 9/16" capacity for #2 Jacobs Taper Spindles & 5/8-16 Threaded Spindles
  • Collets range from 1/32" to 9/16" capacity.
  • Collets can be compressed up to 1/32" smaller than the maximum diameter.

Double-Angle Design Features of Chuck and Collet System

  • Improved Holding Power--Collet grips tool over larger surface area compared to a drill chuck, allowing greater feeds and speeds and increased productivity.
  • More Compact than comparable capacity drill chuck--reducing space requirement and allowing greater positioning flexibility.
  • Chuck/Collet System concentricity is held to .001" - .002" with tapered spindles for 1/8" collets and larger. Consult factory for concentricity for threaded spindles.
  • Adapts to broader range of tool sizes than other Collet types--due to unique slotting arrangement--eliminating necessity of purchasing collet for each drill size. See Collet table below.
  • Maximum capacity achieved while still employing Self-Release Feature, which also allows quick removal of tool.
  • High quality materials and workmanship--Blackalloy general Warranty applies.


Compact Erickson™ Type Collet Chucks & Compressible-Type Collet System for use with Blackalloy Drill Units Series 150 & 250

Collet Selection Chart

Notes
Combined Collet & Chuck Runout .001”-.002” TIR Max 1/8" Collet & Up

.002” TIR Max for 1/32" Collet with Tapered Spindles

Collet Chuck B

C

Chuck Part #
1/4 .375 1.00 7-14-xxx
3/8 .559 1.18 7-38-xxx
9/16 .769 1.44 7-916-xxx
Dimensions in Inches
     
1/4" Collet Chuck
Part # 7-14-xxx
Collet Part# A
7031-14 1/32 .031
7047-14 3/64 .047
7062-14 1/16 .062
7078-14 5/64 .078
7094-14 3/32 .094
7109-14 7/64 .109
7125-14 1/8 .125
7141-14 9/64 .141
7156-14 5/32 .156
7172-14 11/64 .172
7188-14 3/16 .188
7203-14 13/64 .203
7219-14 7/32 .219
7234-14 15/64 .234
7250-14 1/4 .250
Dimensions in Inches



3/8" Collet Chuck
Part # 7-38-xxx
Collet Part# A
-- -- --
7047-38 3/64 .047
7062-38 1/16 .062
7078-38 5/64 .078
7094-38 3/32 .094
7109-38 7/64 .109
7125-38 1/8 .125
7141-38 9/64 .141
7156-38 5/32 .156
7172-38 11/64 .172
7188-38 3/16 .188
7203-38 13/64 .203
7219-38 7/32 .219
7234-38 15/64 .234
7250-38 1/4 .250
7266-38 17/64 .266
7281-38 9/32 .281
7297-38 19/64 .297
7312-38 5/16 .312
7328-38 21/64 .328
7344-38 11/32 .344
7359-38 23/64 .359
7375-38 3/8 .375
7391-38 25/64 .391
Dimensions in Inches

9/16" Collet Chuck
Part # 7-916-xxx
Collet Part# A
-- -- --
7047-916 3/64 .047
7062-916 1/16 .062
7078-916 5/64 .078
7094-916 3/32 .094
7109-916 7/64 .109
7125-916 1/8 .125
7141-916 9/64 .141
7156-916 5/32 .156
7172-916 11/64 .172
7188-916 3/16 .188
7203-916 13/64 .203
7219-916 7/32 .219
7234-916 15/64 .234
7250-916 1/4 .250
7266-916 17/64 .266
7281-916 9/32 .281
7297-916 19/64 .297
7312-916 5/16 .312
7328-916 21/64 .328
7344-916 11/32 .344
7359-916 23/64 .359
7375-916 3/8 .375
7391-916 25/64 .391
7406-916 13/32 .406
7422-916 27/64 .422
7438-916 7/16 .438
7453-916 29/64 .453
7469-916 15/32 .469
7484-916 31/64 .484
7500-916 1/2 .500
7516-916 33/64 .516
7531-916 17/32 .531
7547-916 35/64 .547
7562-916 9/16 .562
Dimensions in Inches

A Collet Size

Jacobs Taper
or Thread

B Dia. Ref C

D Hex Flats

E Flats F Collet Length

Collet Chuck
Part #

Fig #
Max Min
1/4 1/32 #1JT .384 2-5/32 3/4 7/16 1.00 7-14-1JT 1
3/8 3/64 #2JT .559 2-1/2 1 3/4 1.18 7-38-2JT 2
9/16 3/64 #2JT .559 2-7/8 1-1/4 3/4 1.44 7-916-2JT 2
3/8 3/64 5/8-16 .625 2-1/2 1 3/4 1.18 7-38-H6 3
9/16 3/64 5/8-16 .625 2-7/8 1-1/4 3/4 1.44 7-916-H6 3
Dimensions in Inches

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Blackalloy Company of America • 1836 Lonestar Street • Unit 3 • Conway, SC 29526

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