PRODUCT · Locking Assemblies
R12 Keyless Locking Device
R12 keyless locking device: tightening the locking screws presses the inner and outer taper rings together, expanding radially against shaft and hub — zero-backlash bidirectional torque, self-centering, repeatedly removable. Recommended fits: shaft h8 / hub H8. The table lists dimensions, transmissible torque and axial force, contact pressure and DIN 912-12.9 locking screw sizes.
Last updated Reviewed by Luo Genwen, Production Plant Manager
Specifications · Selector
R12 keyless locking device specifications
Filter by the conditions below, or search and click a column header to sort; request a quote in one click. Dimensions per catalogue.
Complete size table · 22 sizes (static version for printing and full-text search)
| Φd mm | ΦD mm | L mm | L1 mm | L2 mm | Ft kN | Mt N·m | P N/mm² | P1 N/mm² | Qty. | Size | TS N·m |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 | 145 | 75 | 5 | 65 | 192 | 9.6 | 102 | 70 | 8 | M12x60 | 145 |
| 110 | 155 | 75 | 5 | 65 | 191 | 10.5 | 93 | 66 | 8 | M12x60 | 145 |
| 120 | 165 | 75 | 5 | 65 | 216 | 13 | 96 | 70 | 9 | M12x60 | 145 |
| 130 | 180 | 84 | 6 | 72 | 287 | 17.8 | 100 | 78 | 12 | M12x70 | 145 |
| 140 | 190 | 84 | 6 | 72 | 287 | 20.2 | 94 | 69 | 12 | M12x70 | 145 |
| 150 | 200 | 84 | 6 | 72 | 287 | 21.6 | 88 | 66 | 12 | M12x70 | 145 |
| 160 | 210 | 84 | 6 | 72 | 360 | 28.8 | 101 | 77 | 15 | M12x70 | 145 |
| 170 | 225 | 84 | 6 | 72 | 383 | 32.6 | 101 | 76 | 16 | M12x70 | 145 |
| 180 | 235 | 84 | 6 | 72 | 431 | 38.8 | 108 | 82 | 18 | M12x70 | 145 |
| 190 | 250 | 94 | 6 | 81 | 493 | 46.8 | 106 | 80 | 15 | M14x75 | 230 |
| 200 | 260 | 94 | 6 | 81 | 526 | 52.8 | 100 | 77 | 16 | M14x75 | 230 |
| 220 | 285 | 94 | 6 | 81 | 640 | 70 | 119 | 92 | 14 | M16x75 | 355 |
| 240 | 305 | 112 | 7 | 98 | 731 | 88 | 96 | 75 | 16 | M16x90 | 355 |
| 260 | 325 | 112 | 7 | 98 | 822 | 107 | 103 | 82 | 18 | M16x90 | 355 |
| 280 | 355 | 120 | 8 | 106 | 910 | 128 | 96 | 75 | 20 | M16x100 | 355 |
| 300 | 375 | 120 | 8 | 106 | 1000 | 151 | 99 | 79 | 22 | M16x100 | 355 |
| 320 | 405 | 142 | 8 | 125 | 1280 | 206 | 101 | 80 | 18 | M20x120 | 690 |
| 340 | 425 | 142 | 8 | 125 | 1420 | 242 | 106 | 85 | 20 | M20x120 | 690 |
| 360 | 455 | 159 | 8 | 140 | 1770 | 319 | 113 | 89 | 20 | M22x130 | 930 |
| 380 | 475 | 159 | 8 | 140 | 1770 | 337 | 109 | 87 | 20 | M22x130 | 930 |
| 400 | 485 | 159 | 8 | 140 | 1770 | 355 | 101 | 83 | 20 | M22x130 | 930 |
| 420 | 515 | 159 | 8 | 140 | 1980 | 410 | 107 | 87 | 22 | M22x130 | 930 |
Static copy of the selector data for reference and printing; use the interactive selector above to filter, sort and request a quote. All dimensions in mm; full range and tolerances per the PDF catalogue.
Click a column header to sort · one-click quote · full range & tolerances per PDF catalogue. Download PDF catalogue ↗
FAQ
Common questions about this series
R12 Keyless Locking Device: what size range does the table cover?
The table lists 22 sizes: shaft diameters Ø100–Ø420 mm, hub bores Ø145–Ø515 mm. Intermediate or larger sizes are machined from solid to your shaft and hub dimensions.
R12 Keyless Locking Device: what is it and when should I use it?
R12 keyless locking device: tightening the locking screws presses the inner and outer taper rings together, expanding radially against shaft and hub — zero-backlash bidirectional torque, self-centering, repeatedly removable. Recommended fits: shaft h8 / hub H8. The table lists dimensions, transmissible torque and axial force, contact pressure and DIN 912-12.9 locking screw sizes. All R-series keyless locking devices work the same way — tightening the screws presses tapered rings together, clamping shaft and hub with zero backlash, self-centring and repeatable removal — and the types differ in construction: outer diameter for a given shaft, overall length, whether the hub needs a shoulder or a flange, and the force the screws must be tightened to. Compare the Ø d / Ø D / L columns and the transmissible torque Mt on this page against your shaft and hub, and pick the smallest type that fits.
R12 Keyless Locking Device: can I order a size that is not in the table, or just one piece?
Yes. Everything on this page is made to drawing, and the table is only the standard-size subset of the catalogue. Minimum order quantity is one piece — we routinely make single replacement parts for OEMs whose original supplier has discontinued the item. Send a DWG, STEP or PDF drawing (or a sample part): you get a formal quotation within 24 hours after the information is complete, and the first article ships within 30 days of drawing approval, with inspection records.
R12 Keyless Locking Device: what do I need to send to get a quote?
Send: shaft diameter and tolerance, hub bore and outside diameter, available hub length, torque to be transmitted (and any axial load), speed, whether the hub can have a shoulder or flange, and quantity. We will confirm the type and size and check surface pressure against your hub material.