Hardinge Tool Holders, Toolholder Collets and Bushings Catalog ...

GK Self-Feeding Tap Holder, Collets and Drivers
Model Max. Tap Size Max. Thrd Length Adj.
Number Inch mm Inch mm
GK11 1 ⁄4" 6.35 mm 19 ⁄32" 15.08 mm
GK12 1 ⁄4" 6.35 mm 19 ⁄32" 15.08 mm
GK21 9 ⁄16" 14.29 mm 27 ⁄32" 21.43 mm
GK22 9 ⁄16" 14.29 mm 19 ⁄32" 15.08 mm
GK Self-Feeding (Pafix) Tap Holders with Collet and Driver
GK Self-Feeding (Pafix) Tap Holders provide automatic thread-length control. The
tap holder eliminates the need to perfectly match the feed rate to the thread pitch,
minimizing tool breakage and "pulled" or "squeezed" threads.
The holders have a 5 ⁄8" (15.87mm) shank diameter that allows it to be mounted
into a round shank tool holder. Thread length is controlled internally with an
adjusting ring in .01" (.25mm) increments. A driver is used in the holder to accommodate
the square of the tap shank, providing a positive drive. A collet is used to
centralize and hold the tap in the holder. Tap holders are supplied standard with
the necessary collets and drivers. Replacement tap collets and drivers are sold
separately. The same unit is used for left- and right-hand taps. The GK11 and GK12
models come with 3 tap collets and 4 drivers. The GK21 and GK22 come with
(6) tap collets and (6) drivers.
Model Part A B C D-Shank F L
Number Number Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm
GK11 K11-0011202-K 2.17" 55.10 1.25" 31.80 3.42" 86.90 .625" 15.880 1.58" 40.10 .77" 19.60
GK12 S12-0011202-K 1.89" 48.00 1.25" 31.80 3.14" 79.80 .625" 15.880 1.58" 40.10 .77" 19.60
GK21 K21-0011202-K 2.17" 55.10 1.25" 31.80 3.42" 86.90 .625" 15.880 1.58" 40.10 .77" 19.60
GK22 S22-0011202-K 1.89" 48.00 1.25" 31.80 3.14" 79.80 .625" 15.880 1.58" 40.10 .77" 19.60
NOTE: Collets and Drivers are included with each Tap Holder.
See page 37 for shank sizes of Metric taps in ANSI, ISO, JIS, CIC & DIN specifications.
Replacement Tap Collets and Drivers
Model Tap Size Shank Collet Tap Driver Collet Driver
Number English mm Dia. Number Square Number Part Number Part Number
GK11/12 #6 1.6 .141" 4 - 3.5 .110" 2.8 1T-0011831-C1 1T-0011831-D1
GK11/12 #8 4 .168" 5 - 4 .131" 3.55 1T-0011831-C2 1T-0011831-D2
GK11/12 #10 4.5 - 5 .194" 5 - 4 .152" 4 1T-0011831-C2 1T-0011831-D2
GK11/12 #12 — .220" 6.5 - 5.5 .165" 4 1T-0011831-C3 1T-0011831-D3
GK11/12 #14 6 .255" 6.5 - 5.5 .191" 5 1T-0011831-C3 1T-0011831-D4
GK11/12 1 ⁄4" — .255" 6.5 - 5.5 .191" 5 1T-0011831-C3 1T-0011831-D4
GK21/22 #8 4 .168" 5 - 4 .131" 3.55 2T-0011831-C1 2T-0011831-D1
GK21/22 #10 4.5 - 5 .194" 5 - 4 .152" 4 2T-0011831-C2 2T-0011831-D2
GK21/22 #12 — .220" 6 - 5 .165" 4 2T-0011831-C2 2T-0011831-D2
GK21/22 #14 6 .255" 7 - 6 .191" 5 2T-0011831-C3 2T-0011831-D3
GK21/22 1 ⁄4" 6.3 .255" 7 - 6 .191" 5 2T-0011831-C3 2T-0011831-D3
GK21/22 5 ⁄16" 7 - 8 .318" 9 - 8 .238" 6.3 2T-0011831-C4 2T-0011831-D4
GK21/22 3 ⁄8" 10 .381" 10 - 9 .286" 7.1 2T-0011831-C5 2T-0011831-D6
GK21/22 7 ⁄16" — .323" 9 - 8 .242" 6.3 2T-0011831-C4 2T-0011831-D4
GK21/22 1 ⁄2" 12 - 12.5 .367" 10 - 9 .274" 7.1 2T-0011831-C5 2T-0011831-D6
GK21/22 9 ⁄16" 14 .429" 11 - 10 .322" 8 2T-0011831-C6 2T-0011831-D7
34—Toolholder Collets, Bushings & Tool Holders Hardinge Inc. | 800.843.8801 | www.shophardinge.com
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