Series T – Torque Limiters
Our Series T torque limiters feature a ball-detent clutch design. These adjustable torque limiters are available as couplings or pulley mount configurations. Our adjustable ball-dent torque limiters feature zero backlash, high rigidity, a disengagement detection ring, and multiple connection options.
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Torque Range: 1 Nm to 700 Nm across up to 8 frame sizes per series
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Bore Sizes: 3 mm to 80 mm (0.125 in to 3.125 in) in metric and inch options
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Mounting Styles: Conical clamping hub, keyway hollow bore, split clamping hub, or clamping collar
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Temperature Rating: -30°C to +120°C (-22°F to +270°F) standard, with custom high-temperature options available
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Misalignment Capacity: Absorbs angular, axial, and parallel shaft misalignments (TB and TE/TAE coupling models)
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Vibration Damping: Electrically conductive TPU or Hytrel elastomer inserts available for ATEX-compliant explosive environments and smooth torque transmission
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Customization: Stainless steel construction, custom bore sizes, and modified torque ranges available upon request
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Ultra-Fast Disengagement: Disengages in 1-3 ms upon overload to instantly protect expensive drive components and minimize downtime.
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Zero-Backlash Ball-Detent Design: Patented ball-detent mechanism eliminates rotational play for precise positioning and exact rotary motion.
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6 Versatile Configuration Models: Available in 3 shaft coupling designs (TH, TB, TE) and 3 hub/pulley mount designs (THK, TA, TAE) to match any drive layout.
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4 Re-engagement Options: Choose from single-position (360°), multi-position, freewheeling, or load-holding designs based on machine safety requirements.
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Integrated Disengagement Detection: Built-in actuation ring triggers proximity sensors for automated motor shutdown upon overload.
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Low Residual Torque: Retains only 2.5% residual torque post-disengagement, preventing excessive wear on internal clutch components.
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High-Dynamic Performance: Compact design delivers low moment of inertia for fast acceleration in servo and ball screw applications.
- Download the Catalog
- Download CAD Drawings (See the Charts Below)
- Request more Information
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Torque Limiter Overview:
Model TH – Torque Limiter Coupling with Conical Clamp
(7 sizes with rated torque from 5-650 Nm)
Design Description: A hub design for mounting pulleys, sprockets, or gears. Shaft connection is by standard conical clamping hub.
Bore Diameters: Metric or inch bores from 8-56 mm, or 0.315-2.205 inches. Keyways are not available on these models.
Temperature Range: From as low as -30° C to as high as +120° C in standard version (3.6° F to 270° F). High temperature options available.
Sizes: TH-15, TH-30, TH-60, TH-150, TH-200, TH-300, TH-500
Sizing Chart:
| TH | 15 | 30 | 60 | 150 | 200 | 300 | 500 | |
|---|---|---|---|---|---|---|---|---|
| Adjustment Range available from - to (approx. values) (Nm) | T KN | 5-15 12-25 20-40 35-70 | 5-20 10-30 20-60 50-100 | 10-30 25-80 50-115 | 20-70 45-150 80-225 | 30-90 60-160 140-280 250-400 | 100-200 150-240 220-440 | 80-200 200-350 320-650 |
| Adjustment Range available from - to (approx. values) ("F" version) | T KN | 7-15 | 8-20 or 16-30 | 10-30 20-40 30-60 | 20-60 40-80 80-150 | 80-140 or 130-200 | 120-180 160-300 300-450 | 50-150 100-300 250-500 |
| Overall Length (mm) | A | 40 | 50 | 54 | 58 | 63 | 70 | 84 |
| Overall length ("F" version) (mm) | ᴬF | 40 | 50 | 54 | 58 | 66 | 73 | 88 |
| Actuation ring ∅ (mm) | B | 55 | 65 | 73 | 92 | 99 | 120 | 135 |
| Actuation ring ∅ ("F" Version) (mm) | ᴮF | 62 | 70 | 83 | 98 | 117 | 132 | 155 |
| Clamping fit length (mm) | C | 19 | 22 | 27.5 | 32 | 32 | 41 | 41 |
| Inner Diameter from ∅ to ∅ H7 (mm) | D | 8-22 | 12-22 | 12-29 | 15-37 | 20-44 | 25-56 | 25-56 |
| Pilot Diameter h7 (mm) | E | 40 | 47 | 55 | 68 | 75 | 82 | 90 |
| Bolt-hole Circle Diameter ± 0.2 (mm) | F | 47 | 54 | 63 | 78 | 85 | 98 | 110 |
| Flange outside diameter -0.2 (mm) | G | 53 | 63 | 72 | 87 | 98 | 112 | 128 |
| Thread | H | 6xM4 | 6xM5 | 6xM5 | 6xM6 | 6xM6 | 6xM8 | 6xM8 |
| Distance (mm) | K | 8 | 11 | 11 | 12 | 12 | 15 | 21 |
| Distance (mm) | L | 27 | 37 | 39 | 41.5 | 47 | 51.5 | 59 |
| Distance ("F" Version) (mm) | ᴸF | 27 | 37 | 39 | 41.5 | 47 | 51.5 | 68 |
| Download - 2D DWG (W,D,G) | ||||||||
| Download - 2D DWG (F) | ||||||||
| Download - 2D PDF (W,D,G) | ||||||||
| Download - 2D PDF (F) | ||||||||
| Download - 3D STP (W,D,G) | STP | STP | STP | STP | STP | STP | STP | |
| Download - 3D STP (F) | STP | STP | STP | STP | STP | STP | STP | |
| For Full Tech Details Download Catalog |
Model THK – Torque Limiter Coupling with Keyway Connection
(7 sizes with rated torque from 5-650 Nm)
Design Description: A hub design for mounting pulleys, sprockets, or gears. Shaft connection is by hollow bore with keyway.
Bore Diameters: Metric or inch bores from 8-58 mm, or 0.315-2.283 inches. Keyway sizes must be specified.
Temperature Range: From as low as -30° C to as high as +120° C in standard version (3.6° F to 270° F). High temperature options available.
Sizes: THK-15, THK-30, THK-60, THK-150, THK-200, THK-300, THK-500
Sizing Chart:
| THK | 15 | 30 | 60 | 150 | 200 | 300 | 500 | |
|---|---|---|---|---|---|---|---|---|
| Adjustment Range available from - to (approx. values) (Nm) | T KN | 5-15 12-25 20-40 35-70 | 5-20 10-30 20-60 50-100 | 10-30 25-80 50-115 | 20-70 45-150 80-225 | 30-90 60-160 140-280 250-400 | 100-200 150-240 220-440 | 80-200 200-350 320-650 |
| Adjustment Range available from - to (approx. values) ("F" version) | T KN | 7-15 | 8-20 or 16-30 | 10-30 20-40 30-60 | 20-60 40-80 80-150 | 80-140 or 130-200 | 120-180 160-300 300-450 | 50-150 100-300 250-500 |
| Overall Length A (mm) | A | 34 | 43 | 46 | 48.5 | 54 | 57 | 71.5 |
| Overall length ("F" version) (mm) | AF | 34 | 43 | 46 | 48.5 | 57 | 60 | 75 |
| Actuation ring ∅ (mm) | B | 55 | 65 | 73 | 92 | 99 | 120 | 135 |
| Actuation ring ∅ ("F" Version) (mm) | BF | 62 | 70 | 83 | 98 | 117 | 132 | 155 |
| Inner Diameter from ∅ to ∅ H7 (mm) | D | 8-19 | 12-25.4 | 12-30 | 15-38 | 20-44 | 25-50 | 25-58 |
| Pilot Diameter h7 (mm) | E | 40 | 47 | 55 | 68 | 75 | 82 | 90 |
| Bolt-hole Circle Diameter ± 0.2 (mm) | F | 47 | 54 | 63 | 78 | 85 | 98 | 110 |
| Flange outside diameter -0.2 (mm) | G | 53 | 63 | 72 | 87 | 98 | 112 | 128 |
| Distance (mm) | K | 8 | 8 | 11 | 12 | 12 | 15 | 21 |
| Distance (mm) | L | 27 | 35 | 37 | 39 | 44 | 47 | 59 |
| Distance ("F" Version) (mm) | LF | 27 | 37 | 39 | 41.5 | 47 | 51.5 | 68 |
| Download - 2D DWG (W,D,G) | ||||||||
| Download - 2D DWG (F) | ||||||||
| Download - 2D PDF (W,D,G) | ||||||||
| Download - 2D PDF (F) | ||||||||
| Download - 3D STP (W,D,G) | STP | STP | STP | STP | STP | STP | STP | |
| Download - 3D STP (F) | STP | STP | STP | STP | STP | STP | STP | |
| For Full Tech Details Download Catalog |
Model TB – Torque Limiter Coupling with Clamping Hubs
(8 sizes with rated torque from 5-500 Nm)
Design Description: A shaft coupling design providing angular, axial, and parallel misalignment compensation, with a single screw split hub shaft connection design.
Bore Diameters: Metric or inch bores from 3-80 mm, or 0.125-3.125 inches. Optional keyway reduces maximum bore capacity.
Temperature Range: From as low as -30° C to as high as +120° C in standard version (3.6° F to 270° F). High temperature options available.
Sizes: TB-15, TB-30, TB-60, TB-80, TB-150, TB-200, TB-300, TB-500
Sizing Chart:
| TB | 15 | 30 | 60 | 80 | 150 | 200 | 300 | 500 | |
|---|---|---|---|---|---|---|---|---|---|
| Adjustment Range available from - to (approx. values) (Nm) | T KN | 5-10 or 8-20 | 10-25 or 20-40 | 10-30 or 25-80 | 20-70 or 30-90 | 20-70 45-150 80-180 | 30-90 60-160 140-240 250-400 | 100-200 150-240 20-320 | 80-200 200-350 300-500 |
| Adjustment Range available from - to (approx. values) ("F" version) | T KN | 7-15 | 8-20 or 16-30 | 20-40 or 30-60 | 20-60 or 40-80 | 20-60 40-80 80-150 | 80-140 or 130-200 | 120-180 or 160-300 | 60-150 100-300 250-500 |
| Overall Length (mm) | A | 75 | 82 | 87 | 95 | 102 | 112 | 115 | 127 | 116 | 128 | 128 | 140 | 139 | 153 | 163 | 177 |
| Overall length ("F" version) (mm) | AF | 75 | 82 | 87 | 95 | 102 | 112 | 117 | 129 | 118 | 130 | 131 | 143 | 142 | 156 | 167 | 181 |
| Actuation ring ∅ (mm) | B | 55 | 65 | 73 | 92 | 92 | 99 | 120 | 135 |
| Actuation ring ∅ ("F" Version) (mm) | BF | 62 | 70 | 83 | 98 | 98 | 117 | 132 | 155 |
| Clamping fit length (mm) | C | 22 | 27 | 31 | 35 | 35 | 40 | 42 | 51 |
| Inside Diameter from ∅ to ∅ H7 (mm) | D1/D2 | 10-26 | 12-30 | 15-32 | 19-42 | 19-42 | 24-45 | 30-60 | 35-60 |
| Diameter (mm) | D3 | 21.1 | 24.1 | 32.1 | 36.1 | 36.1 | 42.1 | 58.1 | 60.1 |
| Outside Diameter of coupling (mm) | E | 49 | 55 | 66 | 81 | 81 | 90 | 110 | 123 |
| Distance (mm) | F | 19 | 24 | 28 | 31 | 31 | 35 | 35 | 45 |
| Distance ("F" Version) (mm) | FF | 19 | 22 | 29 | 31 | 30 | 33 | 35 | 43 |
| Distance (mm) | G | 6.5 | 7.5 | 9.5 | 11 | 11 | 12.5 | 13 | 17 |
| Distance between centers (mm) | H | 17 | 19 | 23 | 27 | 27 | 31 | 39 | 41 |
| Download - 2D DWG (W, D,G) | |||||||||
| Download - 2D DWG (F) | |||||||||
| Download - 2D PDF (W,D,G) | |||||||||
| Download - 2D PDF (F) | |||||||||
| Download - 3D STP (W,D,G) | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | |
| Download - 3D STP (F) | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | STP | |
| For Full Tech Details Download Catalog |
Model TE – Press-Fit Elastomer Torque Limiter Coupling with Clamping Hub
(7 sizes with rated torque from 1-500 Nm)
Design Description: A more economical jaw coupling design, with elastomer insert for vibration damping. Shaft connection via single screw split hubs. Provides zero backlash along with angular, axial, and parallel misalignment compensation.
Bore Diameters: Metric or inch bores from 6-75 mm, or 0.25-2.875 inches. Keyways are available, but will reduce bore capacity.
Temperature Range: See Catalog
Sizes: TE-5, TE-20, TE-60, TE-150, TE-300, TE-450
Sizing Chart:
| TA | 30 | 60 | 150 | 300 | |
|---|---|---|---|---|---|
| Adjustment range from - to (Nm) | T KN | 10-35 30-80 40-135 | 30-80 60-120 100-200 | 40-100 100-200 150-300 | 200-350 300-450 400-550 550-700 |
| Overall length (mm) | A | 45 | 53 | 63 | 72 |
| Actuation Ring ∅ (mm) | B | 63 | 74 | 92 | 118 |
| Clamping fit length (mm) | C | 15 | 18 | 22 | 24 |
| Bore Diameter from ∅ to ∅ H7 (mm) | D | 12-30 | 16-35 | 19-42 | 22-60 |
| Pilot diameter h7 (mm) | E | 43 | 53 | 68 | 85 |
| Bolt-Hole circle diameter ± 0.2 | F | 48 | 60 | 75 | 95 |
| Distance (mm) | K | 6 | 7 | 9 | 9 |
| Distance (mm) | M | 7.5 | 9 | 11 | 12 |
| ∅ Base element (mm) | O | 35 | 42 | 54 | 70 |
| ∅ Adjustment Nut (mm) | O1 | 55 | 66 | 82 | 100 |
| ∅ Flange -0.2 (mm) | O2 | 58 | 72 | 87 | 110 |
| ∅ Clamp Ring (mm) | O3 | 59 | 72 | 90 | 114 |
| Download - 2D .DWG | |||||
| Download - 3D .STP | STP | STP | STP | STP | |
| For Full Tech Details Download Catalog |
Model TA – Torque Limiter Coupling with Clamping Collar
(4 sizes with rated torque from 10-700 Nm)
Design Description: Aluminum Hub with clamping collar and a single clamping screw. Clutch system spring loaded with ball-detent principal. Operable temperature range from -30 to 120°C
Bore Diameters: Metric or inch diameters from 12-60 mm.
Sizes: TA-30, TA-60, TA-150 and TA-300
Sizing Chart:
| Description | Download |
|---|---|
| FDB - Solid Brake | Download Now |
| FDD - Double Brake | Download Now |
| FDS - Holding Brake | Download Now |
| FDW - Waterproof Brake | Download Now |
| FDX - Seawater Brake | Download Now |
| FLC - Economy Brake | Download Now |
| OLG/OLK - Clutch | Download Now |
| Half-Wave & Bridge Rectifiers | Download Now |
Model TAE – Press-Fit Elastomer Torque Limiter Coupling with Clamping Hub
(4 sizes with rated torque from 10-700 Nm)
Design Description: A more economical jaw coupling design, with elastomer insert for vibration damping. Shaft connection via single screw split hubs. Provides zero backlash along with angular, axial, and parallel misalignment compensation.
Bore Diameters: Metric or inch bores from 12 mm – 60 mm or 0.47 – 2.36 inches.
Temperature Range: See catalog
Sizes: TAE-30, TAE-60, TAE-150 and TAE-300
Sizing Chart:
| TAE | 30 | 60 | 150 | 300 | |
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| Type (elastomer insert) | A | B | A | B | A | B | A | B | |
| Rated Torque | T KN | 60 | 75 | 160 | 200 | 325 | 405 | 530 | 660 |
| Max. Torque | TKN max | 120 | 150 | 320 | 400 | 650 | 810 | 1060 | 1350 |
| Adjustment range possible from - to (Nm) | T KN | 10-35 30-80 40-135 | 30-80 60-120 100-200 | 40-100 100-200 150-300 | 200-350 300-450 400-550 550-700 |
| Overall Length (mm) | A | 85 | 93 | 122 | 135 |
| Actuation ring diameter (mm) | B | 63 | 74 | 92 | 118 |
| Hub Length (coupling hub end) (mm) | C/C1 | 20/36 | 21/39 | 31/52 | 34/57 |
| Length of Hub (torque limiting portion) | C2 | 45 | 53 | 63 | 72 |
| Bore diameter from ∅ to ∅ H7 (mm) | D1/D2 | 12-32/12-30 | 16-36/16-35 | 19-45/19-42 | 22-60/22-60 |
| Inner diameter (elastomer insert) | DE | 26.2 | 29.2 | 36.2 | 46.2 |
| Distance to actuation ring edge (mm) | L | 22 | 26 | 32 | 35 |
| Distance (mm) | M1/M2 | 10/7.5 | 12/9 | 15/11 | 17.5/12 |
| Clamping Hub ∅, elastomer coupling | O | 56 | 66.5 | 82 | 102 |
| ∅ Adjustment nut | O1 | 55 | 66 | 82 | 100 |
| Clamping hub ∅, safety coupling | O2 | 59 | 72 | 90 | 112 |
| Download - 2D DWG | |||||
| Download - 3D STP | STP | STP | STP | STP | |
| For Full Tech Details Download Catalog |
Coupling Insert Options, Temperature Ranges, and Stiffness Ratings:
The elastomer inserts are made of thermoplastic polyurethane (TPU), in a variety of shore values. To provide different stiffness and vibration damping characteristics, optional Hytrel® material can be offered for higher temperature applications.
The inserts are pre-stressed during assembly which provides zero backlash, more consistent load sharing, and improved restoring forces for precise positioning and repeatability.
For information on shaft misalignment, torsional stiffness and other details about the elastomer inserts, please download the catalog.
* Due to the electrically conductive properties of the insert, electrostatically charging of the coupling is prevented. This eliminates sparks during normal operation in explosive areas. Technical data is available upon request.
The values of the relative damping were determined at 10 Hz and 20˚C.
Other Models Available
Why Choose Torque Limiters & Safety Couplings?
Torque limiters and safety couplings are available in pulley and coupling mount designs. They feature zero backlash, high rigidity and a disengagement detection ring, as well as multiple connection options.
