For Use With For Use With |
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For Tap Size For Tap Size |
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Shank Type Shank Type |
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Morse Taper | Round |
For Bit Shank Size For Bit Shank Size |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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For Tap Size in Steel For Tap Size in Steel |
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For Tap Size in Aluminum For Tap Size in Aluminum |
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Component Component |
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Procunier Auto-Reversing Tap Holders for Straight and Morse Taper Spindles

These instantly reversing tap holders allow you to back out of a hole once it has been tapped without stopping the machine's motor. They’re also known as tapping heads. Use them for fast, precise tapping on manually operated drill presses and milling machines. Collets (sold separately) are required to connect the tap to the holder.

Procunier Number | Shank Dia. | For Tap Size in Aluminum | For Tap Size in Steel | Max Speed, rpm | Material | Each | |
1-E | 1/2" | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M6 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No.10, No.12, M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5 | 3,000 | Steel | 00000000 | 0000000 |
2-E | 1/2" | No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M4, M4.5, M5, M6, M6.3, M7, M8, M9, M10, M11, M12, 1/8 Pipe | No. 6, No. 8, No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", M4, M4.5, M5, M6, M6.3, M7, M8 | 2,000 | Steel | 00000000 | 00000000 |
3-E | 3/4" | No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, 1/4 Pipe | No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M6, M6.3, M7, M8, M9, M10, M11, M12 | 1,000 | Steel | 00000000 | 00000000 |
4-F | 3/4" | 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24, M26, M27, 1/4 Pipe, 3/8 Pipe, 1/2 Pipe, 3/4 Pipe | 1/4", 9/32", 5/16", 11/32", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24 | 800 | Steel | 00000000 | 00000000 |

Procunier Number | Morse Taper Number | For Tap Size in Aluminum | For Tap Size in Steel | Max. Speed, rpm | Material | Each | |
1-E | 1 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M6 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No.10, No.12, M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5 | 3,000 | Steel | 00000000 | 0000000 |
1-E | 2 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M6 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No.10, No.12, M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5 | 3,000 | Steel | 00000000 | 000000 |
2-E | 2 | No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M4, M4.5, M5, M6, M6.3, M7, M8, M9, M10, M11, M12, 1/8 Pipe | No. 6, No. 8, No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", M4, M4.5, M5, M6, M6.3, M7, M8 | 2,000 | Steel | 00000000 | 00000000 |
2-E | 3 | No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M4, M4.5, M5, M6, M6.3, M7, M8, M9, M10, M11, M12, 1/8 Pipe | No. 6, No. 8, No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", M4, M4.5, M5, M6, M6.3, M7, M8 | 2,000 | Steel | 00000000 | 00000000 |
3-E | 2 | No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, 1/4 Pipe | No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M6, M6.3, M7, M8, M9, M10, M11, M12 | 1,000 | Steel | 00000000 | 00000000 |
3-E | 3 | No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, 1/4 Pipe | No.10, No.12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M6, M6.3, M7, M8, M9, M10, M11, M12 | 1,000 | Steel | 00000000 | 00000000 |
4-F | 3 | 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24, M26, M27, 1/4 Pipe, 3/8 Pipe, 1/2 Pipe, 3/4 Pipe | 1/4", 9/32", 5/16", 11/32", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24 | 800 | Steel | 00000000 | 00000000 |
4-F | 4 | 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24, M26, M27, 1/4 Pipe, 3/8 Pipe, 1/2 Pipe, 3/4 Pipe | 1/4", 9/32", 5/16", 11/32", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", M7, M8, M9, M10, M11, M12, M12.5, M14, M15.2, M16, M18, M18.6, M20, M20.4, M22, M22.5, M24 | 800 | Steel | 00000000 | 00000000 |






Procunier Number | Each | |
Clutch Assembly | ||
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1-E | 00000000 | 0000000 |
2-E | 00000000 | 000000 |
3-E | 00000000 | 000000 |
4-F | 00000000 | 000000 |
Clutch Spring | ||
1-E | 00000000 | 00000 |
2-E | 00000000 | 00000 |
3-E | 00000000 | 00000 |
4-F | 00000000 | 00000 |
Collet Nut | ||
1-E | 0000000 | 00000 |
2-E | 0000000 | 00000 |
3-E | 0000000 | 00000 |
4-F | 0000000 | 00000 |
Spindle | ||
1-E | 00000000 | 000000 |
2-E | 00000000 | 000000 |
3-E | 00000000 | 000000 |
4-F | 00000000 | 000000 |
Stud Nut | ||
1-E | 00000000 | 0000 |
2-E, 3-E | 00000000 | 0000 |
4-F | 00000000 | 0000 |
Wrench | ||
1-E | 00000000 | 00000 |
2-E | 00000000 | 00000 |
3-E | 00000000 | 00000 |
4-F | 00000000 | 00000 |
Parts for Procunier Auto-Reversing Tap Holders for Straight and Morse Taper Spindles






Procunier Number | Each | |
Clutch Assembly | ||
---|---|---|
1-E | 00000000 | 0000000 |
2-E | 00000000 | 000000 |
3-E | 00000000 | 000000 |
4-F | 00000000 | 000000 |
Clutch Spring | ||
1-E | 00000000 | 00000 |
2-E | 00000000 | 00000 |
3-E | 00000000 | 00000 |
4-F | 00000000 | 00000 |
Collet Nut | ||
1-E | 0000000 | 00000 |
2-E | 0000000 | 00000 |
3-E | 0000000 | 00000 |
4-F | 0000000 | 00000 |
Spindle | ||
1-E | 00000000 | 000000 |
2-E | 00000000 | 000000 |
3-E | 00000000 | 000000 |
4-F | 00000000 | 000000 |
Stud Nut | ||
1-E | 00000000 | 0000 |
2-E, 3-E | 00000000 | 0000 |
4-F | 00000000 | 0000 |
Wrench | ||
1-E | 00000000 | 00000 |
2-E | 00000000 | 00000 |
3-E | 00000000 | 00000 |
4-F | 00000000 | 00000 |
Auto-Reversing Tap Holders for Jacobs Taper Shanks


Also known as tapping heads, these holders instantly reverse, allowing you to back out of a hole once it has been tapped without stopping the machine's motor. Use them for fast, precise tapping on manually operated drill presses and milling machines. Each holder comes with a chart that indicates the maximum speed, which may be lower depending on the tap size and workpiece material. Collets (sold separately) are required to connect the tap to the holder.
For technical drawings and 3-D models, click on a part number.
For Tap Size | For Tap Pipe Size | For Use On | Max. Speed, rpm | Material | Each | |
Jacobs Taper 33 | ||||||
---|---|---|---|---|---|---|
No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", M1.4, M1.6, M1.8, M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M6, M6.3, M7 | __ | Steel | 2,000 | Steel | 0000000 | 0000000 |
No. 6, No. 8, No. 10, No. 12, 1/8", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", M3, M3.5, M4, M4.5, M5, M6, M6.3, M7, M8, M9, M10, M11, M12 | 1/16, 1/8 | Steel | 1,500 | Steel | 0000000 | 000000 |
Collets for Procunier Auto-Reversing Tap Holders


Use to attach taps to Procunier auto-reversing tap holders.
For Tap Size | For Tap Pipe Size | Body Dia. | Material | Each | |
For Procunier No. 1-E | |||||
---|---|---|---|---|---|
No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6 | __ | 3/8" | Steel | 00000000 | 000000 |
No. 8 | __ | 3/8" | Steel | 00000000 | 00000 |
No. 10 | __ | 3/8" | Steel | 00000000 | 00000 |
No. 12 | __ | 3/8" | Steel | 00000000 | 00000 |
1/4" | __ | 3/8" | Steel | 00000000 | 00000 |
M2.5 | __ | 3/8" | Steel | 00000000 | 00000 |
M3 | __ | 3/8" | Steel | 00000000 | 00000 |
M4 | __ | 3/8" | Steel | 00000000 | 00000 |
M4.5 | __ | 3/8" | Steel | 00000000 | 00000 |
M5 | __ | 3/8" | Steel | 00000000 | 00000 |
M6 | __ | 3/8" | Steel | 00000000 | 00000 |
For Procunier No. 2-E | |||||
No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6 | __ | 1/2" | Steel | 00000000 | 00000 |
No. 8 | __ | 1/2" | Steel | 00000000 | 00000 |
No. 10 | __ | 1/2" | Steel | 00000000 | 00000 |
No. 12 | __ | 1/2" | Steel | 00000000 | 00000 |
1/4" | __ | 1/2" | Steel | 00000000 | 00000 |
5/16" | __ | 1/2" | Steel | 00000000 | 00000 |
3/8" | __ | 1/2" | Steel | 00000000 | 00000 |
7/16" | __ | 1/2" | Steel | 00000000 | 00000 |
1/2" | __ | 1/2" | Steel | 00000000 | 00000 |
M4 | __ | 1/2" | Steel | 00000000 | 00000 |
M4.5 | __ | 1/2" | Steel | 00000000 | 00000 |
M5 | __ | 1/2" | Steel | 00000000 | 00000 |
M6 | __ | 1/2" | Steel | 00000000 | 00000 |
M7 | __ | 1/2" | Steel | 00000000 | 00000 |
M8 | __ | 1/2" | Steel | 00000000 | 00000 |
For Procunier No. 3-E | |||||
No. 8 | __ | 3/4" | Steel | 0000000 | 00000 |
No. 10 | __ | 3/4" | Steel | 00000000 | 00000 |
No. 12 | __ | 3/4" | Steel | 00000000 | 00000 |
1/4" | __ | 3/4" | Steel | 00000000 | 00000 |
5/16" | __ | 3/4" | Steel | 00000000 | 00000 |
3/8" | __ | 3/4" | Steel | 00000000 | 00000 |
7/16" | __ | 3/4" | Steel | 0000000 | 00000 |
1/2" | __ | 3/4" | Steel | 00000000 | 00000 |
9/16" | __ | 3/4" | Steel | 00000000 | 00000 |
5/8" | __ | 3/4" | Steel | 00000000 | 00000 |
11/16" | __ | 3/4" | Steel | 00000000 | 00000 |
3/4" | __ | 3/4" | Steel | 00000000 | 00000 |
__ | 1/8 | 3/4" | Steel | 0000000 | 00000 |
__ | 1/4 | 3/4" | Steel | 0000000 | 00000 |
M4.5 | __ | 3/4" | Steel | 00000000 | 00000 |
M5 | __ | 3/4" | Steel | 00000000 | 00000 |
M6 | __ | 3/4" | Steel | 00000000 | 00000 |
M7 | __ | 3/4" | Steel | 00000000 | 00000 |
M8 | __ | 3/4" | Steel | 00000000 | 00000 |
For Procunier No. 4-F | |||||
1/4" | __ | 1" | Steel | 00000000 | 00000 |
5/16" | __ | 1" | Steel | 00000000 | 00000 |
3/8" | __ | 1" | Steel | 00000000 | 00000 |
7/16" | __ | 1" | Steel | 00000000 | 00000 |
1/2" | __ | 1" | Steel | 00000000 | 00000 |
5/8" | __ | 1" | Steel | 00000000 | 00000 |
11/16" | __ | 1" | Steel | 00000000 | 00000 |
3/4" | __ | 1" | Steel | 00000000 | 00000 |
13/16" | __ | 1" | Steel | 00000000 | 00000 |
7/8" | __ | 1" | Steel | 00000000 | 00000 |
15/16" | __ | 1" | Steel | 00000000 | 00000 |
1" | __ | 1" | Steel | 00000000 | 00000 |
__ | 1/8 | 1" | Steel | 00000000 | 00000 |
__ | 1/4 | 1" | Steel | 00000000 | 00000 |
__ | 3/8 | 1" | Steel | 00000000 | 00000 |
__ | 1/2 | 1" | Steel | 00000000 | 00000 |
__ | 3/4 | 1" | Steel | 00000000 | 00000 |
M7 | __ | 1" | Steel | 00000000 | 00000 |
M8 | __ | 1" | Steel | 00000000 | 00000 |
Collets for Auto-Reversing Tap Holders for Jacobs Taper Shanks


Attach taps to auto-reversing tap holders for Jacobs taper shanks.
Manufacturer Model Number | For Tap Size | Body Dia. | Overall Lg. | Material | Jaw Insert Material | Each | |
J116 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8 | 0.59" | 0.468" | Rubber | Steel | 00000000 | 000000 |
J117 | No. 10, No. 12, No. 14, 3/16", 7/32", 1/4" | 0.59" | 0.468" | Rubber | Steel | 00000000 | 00000 |
J420 | No. 10, No. 12, No. 14, 3/16", 7/32", 1/4", 9/32", 5/16" | 0.941" | 0.5" | Rubber | Steel | 00000000 | 00000 |
J421 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, No. 14, 3/16", 7/32", 1/4" | 0.941" | 0.5" | Rubber | Steel | 00000000 | 00000 |
J422 | 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2" | 0.941" | 0.5" | Rubber | Steel | 00000000 | 00000 |
J423 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8 | 0.86" | 0.5" | Rubber | Steel | 00000000 | 00000 |
J440 | 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8" | 1.296" | 0.63" | Rubber | Steel | 00000000 | 00000 |
J441 | No. 10, No. 12, No. 14, 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2" | 1.296" | 0.63" | Rubber | Steel | 00000000 | 00000 |
J443 | No. 0, No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, No. 14, 3/16", 7/32", 1/4" | 1.18" | 0.62" | Rubber | Steel | 00000000 | 00000 |