Straight-Shank Auto-Reversing Tapping Heads
Quickly cut internal threads without stopping your drill press or manual mill. These tapping heads reverse twice as fast as they cut, so you can move to your next hole faster. When you lift the quill, they automatically back the tap out, which also helps reduce wear on your machine and taps. A cone clutch system with a tactile stop lets you feel when the tap reaches the bottom of the hole, preventing your taps from breaking in blind holes. These tapping heads are set up for right-hand tapping but can be reconfigured for left-hand tapping. Mount them on machines with a straight spindle or use a collet chuck, drill chuck, or other holder to fit any machine. Add a stop bar to your setup if you can’t brace the stop arm on your machine.
Choose your tapping head based on your tap size and maximum speed. For small holes and soft material, select a head that runs at higher speeds. For large holes and hard material, select a head with a larger tap size since they generate greater torque.
Collets (sold separately) are required to connect your tap to these tapping heads.
| Shank Dia. | Max. Speed, rpm | For Tap Size, Inch | For Tap Size, Metric | For Tap Size, Pipe  | For Tap Thread Direction | Material | Procunier Collet Series | Procunier No. | Includes | Each | |
| 1/2" | 3,000 | No. 0 to 1/4" | M2 to M6 | __ | Right Hand | Steel | 51000, 58000 | 1-E | Two Wrenches, Stop Arm | 2532A811 | 0000000 |
| 1/2" | 2,000 | No. 0 to 1/2" | M4 to M12 | 1/8 | Right Hand | Steel | 52000, 59000 | 2-E | Two Wrenches, Stop Arm | 2532A821 | 00000000 |
| 3/4" | 1,000 | No. 8 to 3/4" | M4.5 to M18 | 1/8, 1/4 | Right Hand | Steel | 53000 | 3-E | Two Wrenches, Stop Arm | 2532A831 | 00000000 |
| 3/4" | 800 | 1/4" to 1 1/8" | M6 to M27 | 1/8, 1/4, 3/8, 1/2, 3/4 | Right Hand | Steel | 54000 | 4-F | Two Wrenches, Stop Arm | 2532A841 | 00000000 |
| For Tap Size, Inch | For Tap Size, Metric | For Tap Size, Pipe | For Shank Dia. | For Square Shank Size | Body Dia. | Overall Lg. | Material | Procunier Collet Series | Each | |
For Procunier No. 1-E | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. 0 to No. 6 | __ | __ | 0.141" | 0.11" | 3/8" | 1 1/32" | Steel | 51000 | 2532A119 | 000000 |
| No. 8 | __ | __ | 0.168" | 0.131" | 3/8" | 1 1/32" | Steel | 51000 | 2532A121 | 00000 |
| No. 10 | __ | __ | 0.194" | 0.152" | 3/8" | 1 1/32" | Steel | 51000 | 2532A122 | 00000 |
| No. 12 | __ | __ | 0.22" | 0.165" | 3/8" | 1 1/32" | Steel | 51000 | 2532A123 | 00000 |
| 1/4" | __ | __ | 0.255" | 0.191" | 3/8" | 1 1/32" | Steel | 51000 | 2532A126 | 00000 |
| __ | M2.5 | __ | 0.099" | 0.079" | 3/8" | 1 1/32" | Steel | 51000 | 2532A511 | 00000 |
| __ | M3 | __ | 0.118" | 0.095" | 3/8" | 1 1/32" | Steel | 51000 | 2532A512 | 00000 |
| __ | M4 | __ | 0.158" | 0.118" | 3/8" | 1 1/32" | Steel | 51000 | 2532A513 | 00000 |
| __ | M4.5 | __ | 0.177" | 0.134" | 3/8" | 1 1/32" | Steel | 51000 | 2532A514 | 00000 |
| __ | M5 | __ | 0.197" | 0.15" | 3/8" | 1 1/32" | Steel | 51000 | 2532A515 | 00000 |
| __ | M6 | __ | 0.236" | 0.193" | 3/8" | 1 1/32" | Steel | 51000 | 2532A516 | 00000 |
For Procunier No. 2-E | ||||||||||
| No. 0 to No. 6 | __ | __ | 0.141" | 0.11" | 1/2" | 1 1/2" | Steel | 52000 | 2532A125 | 00000 |
| No. 8 | __ | __ | 0.168" | 0.131" | 1/2" | 1 1/2" | Steel | 52000 | 2532A127 | 00000 |
| No. 10 | __ | __ | 0.194" | 0.152" | 1/2" | 1 1/2" | Steel | 52000 | 2532A128 | 00000 |
| No. 12 | __ | __ | 0.22" | 0.165" | 1/2" | 1 1/2" | Steel | 52000 | 2532A129 | 00000 |
| 1/4" | __ | __ | 0.255" | 0.191" | 1/2" | 1 1/2" | Steel | 52000 | 2532A133 | 00000 |
| 5/16" | __ | __ | 0.318" | 0.238" | 1/2" | 1 1/2" | Steel | 52000 | 2532A135 | 00000 |
| 3/8" | __ | __ | 0.381" | 0.286" | 1/2" | 1 1/2" | Steel | 52000 | 2532A136 | 00000 |
| 7/16" | __ | __ | 0.323" | 0.242" | 1/2" | 1 1/2" | Steel | 52000 | 2532A524 | 00000 |
| 1/2" | __ | __ | 0.367" | 0.275" | 1/2" | 1 1/2" | Steel | 52000 | 2532A137 | 00000 |
| __ | M4 | __ | 0.158" | 0.118" | 1/2" | 1 1/2" | Steel | 52000 | 2532A517 | 00000 |
| __ | M4.5 | __ | 0.177" | 0.134" | 1/2" | 1 1/2" | Steel | 52000 | 2532A518 | 00000 |
| __ | M5 | __ | 0.197" | 0.15" | 1/2" | 1 1/2" | Steel | 52000 | 2532A519 | 00000 |
| __ | M6 | __ | 0.236" | 0.193" | 1/2" | 1 1/2" | Steel | 52000 | 2532A521 | 00000 |
| __ | M7 | __ | 0.276" | 0.217" | 1/2" | 1 1/2" | Steel | 52000 | 2532A522 | 00000 |
| __ | M8 | __ | 0.315" | 0.244" | 1/2" | 1 1/2" | Steel | 52000 | 2532A523 | 00000 |
For Procunier No. 3-E | ||||||||||
| No. 8 | __ | __ | 0.168" | 0.131" | 3/4" | 1 5/8" | Steel | 53000 | 2532A63 | 00000 |
| No. 10 | __ | __ | 0.194" | 0.152" | 3/4" | 1 5/8" | Steel | 53000 | 2532A148 | 00000 |
| No. 12 | __ | __ | 0.22" | 0.165" | 3/4" | 1 5/8" | Steel | 53000 | 2532A149 | 00000 |
| 1/4" | __ | __ | 0.255" | 0.191" | 3/4" | 1 5/8" | Steel | 53000 | 2532A151 | 00000 |
| 5/16" | __ | __ | 0.318" | 0.238" | 3/4" | 1 5/8" | Steel | 53000 | 2532A153 | 00000 |
| 3/8" | __ | __ | 0.381" | 0.286" | 3/4" | 1 5/8" | Steel | 53000 | 2532A154 | 00000 |
| 7/16" | __ | __ | 0.323" | 0.242" | 3/4" | 1 5/8" | Steel | 53000 | 2532A64 | 00000 |
| 1/2" | __ | __ | 0.367" | 0.275" | 3/4" | 1 5/8" | Steel | 53000 | 2532A157 | 00000 |
| 9/16" | __ | __ | 0.429" | 0.322" | 3/4" | 1 5/8" | Steel | 53000 | 2532A525 | 00000 |
| 5/8" | __ | __ | 0.48" | 0.36" | 3/4" | 1 5/8" | Steel | 53000 | 2532A159 | 00000 |
| 11/16" | __ | __ | 0.542" | 0.406" | 3/4" | 1 5/8" | Steel | 53000 | 2532A526 | 00000 |
| 3/4" | __ | __ | 0.594" | 0.442" | 3/4" | 1 5/8" | Steel | 53000 | 2532A527 | 00000 |
| __ | M4.5 | __ | 0.177" | 0.134" | 3/4" | 1 5/8" | Steel | 53000 | 2532A528 | 00000 |
| __ | M5 | __ | 0.197" | 0.15" | 3/4" | 1 5/8" | Steel | 53000 | 2532A529 | 00000 |
| __ | M6 | __ | 0.236" | 0.193" | 3/4" | 1 5/8" | Steel | 53000 | 2532A531 | 00000 |
| __ | M7 | __ | 0.276" | 0.217" | 3/4" | 1 5/8" | Steel | 53000 | 2532A532 | 00000 |
| __ | M8 | __ | 0.315" | 0.244" | 3/4" | 1 5/8" | Steel | 53000 | 2532A533 | 00000 |
| __ | __ | 1/8 | 0.438" | 0.328" | 3/4" | 1 5/8" | Steel | 53000 | 2532A55 | 00000 |
| __ | __ | 1/4 | 0.563" | 0.421" | 3/4" | 1 5/8" | Steel | 53000 | 2532A56 | 00000 |
For Procunier No. 4-F | ||||||||||
| 1/4" | __ | __ | 0.255" | 0.191" | 1" | 1 7/8" | Steel | 54000 | 2532A211 | 00000 |
| 5/16" | __ | __ | 0.318" | 0.238" | 1" | 1 7/8" | Steel | 54000 | 2532A212 | 00000 |
| 3/8" | __ | __ | 0.381" | 0.286" | 1" | 1 7/8" | Steel | 54000 | 2532A213 | 00000 |
| 7/16" | __ | __ | 0.323" | 0.242" | 1" | 1 7/8" | Steel | 54000 | 2532A534 | 00000 |
| 1/2" | __ | __ | 0.367" | 0.275" | 1" | 1 7/8" | Steel | 54000 | 2532A214 | 00000 |
| 5/8" | __ | __ | 0.48" | 0.36" | 1" | 1 7/8" | Steel | 54000 | 2532A215 | 00000 |
| 11/16" | __ | __ | 0.542" | 0.406" | 1" | 1 7/8" | Steel | 54000 | 2532A535 | 00000 |
| 3/4" | __ | __ | 0.594" | 0.442" | 1" | 1 7/8" | Steel | 54000 | 2532A217 | 00000 |
| 13/16" | __ | __ | 0.652" | 0.489" | 1" | 1 7/8" | Steel | 54000 | 2532A536 | 00000 |
| 7/8" | __ | __ | 0.697" | 0.523" | 1" | 1 7/8" | Steel | 54000 | 2532A219 | 00000 |
| 15/16" | __ | __ | 0.76" | 0.57" | 1" | 1 7/8" | Steel | 54000 | 2532A543 | 00000 |
| 1" | __ | __ | 0.8" | 0.6" | 1" | 1 7/8" | Steel | 54000 | 2532A222 | 00000 |
| __ | M7 | __ | 0.276" | 0.217" | 1" | 1 7/8" | Steel | 54000 | 2532A537 | 00000 |
| __ | M8 | __ | 0.315" | 0.244" | 1" | 1 7/8" | Steel | 54000 | 2532A538 | 00000 |
| __ | __ | 1/8 | 0.438" | 0.328" | 1" | 1 7/8" | Steel | 54000 | 2532A209 | 00000 |
| __ | __ | 1/4 | 0.563" | 0.421" | 1" | 1 7/8" | Steel | 54000 | 2532A539 | 00000 |
| __ | __ | 3/8 | 0.7" | 0.531" | 1" | 1 7/8" | Steel | 54000 | 2532A542 | 00000 |
| __ | __ | 1/2 | 0.687" | 0.515" | 1" | 1 7/8" | Steel | 54000 | 2532A541 | 00000 |
| __ | __ | 3/4 | 0.906" | 0.679" | 1" | 1 7/8" | Steel | 54000 | 2532A544 | 00000 |
| Procunier No. | Includes | Each | |
Bushing Kits | |||
|---|---|---|---|
| 1-E | 1 Shank Bushing, 1 Body Bushing, 2 Reverse Gear Bushings, 3 Stud Washers, 3 Stud Snap Rings | 9836N11 | 000000 |
| 2-E | 1 Shank Bushing, 2 Body Bushings, 3 Reverse Gear Bushings, 6 Stud Washers, 3 Stud Snap Rings | 9836N12 | 000000 |
| 3-E | 1 Shank Bushing, 1 Body Bushing, 2 Reverse Gear Bushings, 6 Stud Washers, 3 Stud Snap Rings | 9836N13 | 00000 |
Clutch Assemblies | |||
| 1-E | 1 Clutch, 1 Clutch Pin, 2 Clutch Screws | 2532A311 | 000000 |
| 2-E | 1 Clutch, 1 Clutch Pin, 2 Clutch Screws | 2532A312 | 000000 |
| 3-E | 1 Clutch, 1 Clutch Pin, 2 Clutch Screws | 2532A313 | 000000 |
| 4-F | 1 Clutch | 2532A314 | 000000 |
Clutch Springs | |||
| 1-E | Clutch Spring, Spring Washer | 2532A321 | 00000 |
| 2-E | Clutch Spring, Spring Washer | 2532A322 | 00000 |
| 3-E | Clutch Spring, Spring Washer | 2532A323 | 00000 |
| 4-F | Clutch Spring, Spring Washer | 2532A324 | 00000 |
Collet Nuts | |||
| 1-E | __ | 2532A57 | 00000 |
| 2-E | __ | 2532A72 | 00000 |
| 3-E | __ | 2532A73 | 00000 |
| 4-F | __ | 2532A74 | 00000 |
Reverse Shell Assemblies | |||
| 1-E | 1 Reverse Shell, 1 Reverse Gear, 2 Reverse Gear Bushings, 4 Screws | 9836N14 | 000000 |
| 2-E | 1 Reverse Shell, 1 Reverse Gear, 2 Reverse Gear Bushings, 4 Screws, 1 Locknut | 9836N15 | 000000 |
| 3-E | 1 Reverse Shell, 1 Reverse Gear, 2 Reverse Gear Bushings, 4 Screws, 1 Locknut | 9836N16 | 000000 |
Spindles | |||
| 1-E | __ | 2532A911 | 000000 |
| 2-E | __ | 2532A912 | 000000 |
| 3-E | __ | 2532A913 | 000000 |
| 4-F | __ | 2532A914 | 000000 |
Stud Nuts | |||
| 1-E | __ | 2532A331 | 0000 |
| 2-E, 3-E | __ | 2532A332 | 0000 |
| 4-F | __ | 2532A334 | 0000 |
Wrenches | |||
| 1-E | __ | 2532A341 | 00000 |
| 2-E | __ | 2532A342 | 00000 |
| 3-E | __ | 2532A443 | 00000 |
| 4-F | __ | 2532A444 | 00000 |
Straight-Shank Rigid Tap Holders
Hold quick-change tap collets on CNC lathes and mills with rigid tapping capabilities. You can mount them directly to your machine's straight spindle or use another tool holder, such as an end mill holder. They're rigid, so they move your tap in perfect sync with your machine's spindle speed and feed rate without any flex or compensation. The hardened steel shank resists wear. It’s also precision ground for a secure fit that minimizes runout in your machine spindle.
Use these holders with tang-drive quick-change tap collets (also known as Bilz-style tap adapters) to swap taps in seconds and limit machine downtime. They are not compatible with ball-drive quick-change tap collets or quick-change tap collets with torque control.
For the best performance, select a quick-change collet size that places your tap near the middle of the listed tap size range.
For Tap Size | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Quick-Change Tap Collet Size | Inch | Metric | Pipe | Projection | Overall Lg. | Body Dia. | TIR (Total Indicated Runout) Accuracy | Material | Each | |
1" Shank Dia. | ||||||||||
| 1 | No. 0 to 9/16" | M1.6 to M14 | 1/8 | 1 5/8" | 3 1/2" | 1 1/4" | 0.0001" | Hardened Steel | 8984N11 | 0000000 |
| 2 | 5/16" to 7/8" | M7 to M22 | 1/4 to 1/2 | 2 1/2" | 4 1/2" | 2" | 0.0001" | Hardened Steel | 8984N12 | 000000 |
1 1/2" Shank Dia. | ||||||||||
| 3 | 1/2" to 1 3/8" | M12 to M33 | 3/8 to 1 | 3 1/2" | 7" | 2 7/8" | 0.0001" | Hardened Steel | 8984N13 | 000000 |
Straight-Shank Compensating Tap Holders
Minimize stress on taps to produce clean, accurate threads. These holders work with CNC lathes and mills that don't support rigid tapping. You can mount them directly to your machine's straight spindle or use another tool holder, such as an end mill holder. Also called tension and compression tap holders, they compress as the tap enters material and extend as it backs out, compensating for small spindle and feed rate mismatches. Not only does this protect the tap but also the threads you just cut. They’re often used when tapping through and blind holes with spiral-point and spiral-flute taps.
Their hardened steel shank resists wear. It’s also precision ground for a secure fit that minimizes runout in your machine spindle.
Use these holders with tang-drive quick-change tap collets (also known as Bilz-style tap adapters) to swap taps in seconds and limit machine downtime. They are not compatible with ball-drive quick-change tap collets.
For the best performance, select a quick-change collet size that places your tap near the middle of the listed tap size range.
For Tap Size | Length | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Quick-Change Tap Collet Size | Inch | Metric | Pipe | Extended | Compressed | Projection | Overall Lg. | Body Dia. | TIR (Total Indicated Runout) Accuracy | Material | Each | |
1" Shank Dia. | ||||||||||||
| 1 | No. 0 to 9/16" | M1.6 to M14 | 1/8 | 2.11" | 1.41" | 1 3/4" | 3 3/4" | 1 1/2" | 0.0001" | Hardened Steel | 8974N11 | 0000000 |
| 2 | 5/16" to 7/8" | M7 to M22 | 1/4 to 1/2 | 3.11" | 1.93" | 2 1/2" | 4 1/2" | 2 1/8" | 0.0001" | Hardened Steel | 8974N12 | 000000 |
1 1/2" Shank Dia. | ||||||||||||
| 3 | 1/2" to 1 3/8" | M12 to M33 | 3/8 to 1 | 4.74" | 2.86" | 3 3/4" | 7 1/4" | 3 1/8" | 0.0001" | Hardened Steel | 8974N13 | 000000 |