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.
- Bore Diameter ranges between 3 mm to 100 mm
- Temperature range from -30° C up to 120° C
- Fast Disengagement: Breaks free in 1-3 ms to protect drive components and reduce downtime.
- 6 Models: Provides various load connection options, including 3 torque-limiting shaft couplings and 3 pulley/gear hub versions, for maximum design versatility.
- 4 Disengagement Designs: Available in single-position, multi-position, freewheeling, or load-holding designs.
- Zero Backlash: The patented ball-detent design on these torque-limiting shaft couplings assures no play, providing exact positioning and precise rotary motion.
- Low Inertia: Ideal for servo or ball screw drive applications requiring quick acceleration.
- Adjustable Settings: A wide torque range is available on each model, which can be field-adjusted for the optimal setting.
- Disengagement Detection: An actuation ring can be sensed, with a separate proximity switch, for automated machine shut-off.
- Low Residual Torque: Only 2.5% residual torque after disengagement, reducing torque limiter wear.
- Non-Standard Applications: Modifications, custom designs, and different materials, including stainless steel, are available upon request.
- Download the Catalog
- Download CAD Drawings (See the Charts Below)
- Request more Information
What’s Next?
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:
| TE | 5 | 10 | 20 | 60 | 150 | 300 | 450 | |
|---|---|---|---|---|---|---|---|---|
| Type (Elastomer insert) | A | B | A | B | A | B | A | B | A | B | A | B | A | B | |
| Rated Torque (Nm) | T KN | 9 | 12 | 12.5 | 16 | 17 | 21 | 60 | 75 | 160 | 200 | 325 | 405 | 530 | 660 |
| Max. Torque (Nm) | T Kmax | 18 | 24 | 25 | 32 | 34 | 42 | 120 | 150 | 320 | 400 | 650 | 810 | 1060 | 1350 |
| Adjustment range possible from - to (Nm) | T KN | 1-3 or 3-6 | 2-6 or 4-12 | 10-25 or 20-40 | 10-30 or 25-80 | 20-70 45-150 80-180 | 100-200 150-240 200-320 | 80-200 200-350 300-500 |
| Adjustment range ("F" version) possible from - to (Nm) | TKNF | 2.5-4.5 | 2-5 or 5-10 | 8-20 or 16-30 | 20-40 or 30-60 | 20-60 40-80 80-150 | 120-180 or 180-300 | 60-150 100-300 250-500 |
| Overall length (mm) | A | 50 | 60 | 86 | 96 | 106 | 140 | 164 |
| Overall length ("F" version) (mm) | ᴬF | 50 | 60 | 86 | 96 | 108 | 140 | 164 |
| Actuation ring ∅ (mm) | B | 35 | 45 | 65 | 73 | 92 | 120 | 135 |
| Outside Diameter of actuation ring ("F" Version) (mm) | ᴮF | 42 | 51.5 | 70 | 83 | 98 | 132 | 155 |
| Clamping fit length (mm) | C1 | 8 | 10.3 | 17 | 20 | 21 | 31 | 34 |
| Fit Length (mm) | C2 | 14 | 16 | 27 | 31 | 35 | 42 | 51 |
| Length of Hub (mm) | C3 | 16.7 | 20.7 | 31 | 36 | 39 | 52 | 57 |
| Inside Diameter from ∅ to ∅ H7 (mm) | D1 | 4-12.7 | 5-16 | 8-25 | 12-32 | 19-36 | 20-45 | 28-60 |
| Inside Diameter from ∅ to ∅ H7 (mm) | D2 | 6-14 | 6-16 | 12-30 | 15-32 | 19-42 | 30-60 | 35-60 |
| Diameter (mm) | D3 | 14.1 | 20.1 | 24.1 | 32.1 | 36.1 | 58.1 | 60.1 |
| Inside Diameter (Elastomer coupling) (mm) | DE | 10.2 | 14.2 | 19.2 | 26.2 | 29.2 | 36.2 | 46.2 |
| Diameter of the hub (mm) | E1 | 25 | 32 | 42 | 56 | 66.5 | 82 | 102 |
| Diameter of the hub (mm) | E2 | 19 | 40 | 55 | 66 | 81 | 110 | 123 |
| Distance (mm) | F | 15 | 17 | 24 | 28 | 31 | 35 | 45 |
| Distance ("F" Version) (mm) | FF | 14 | 16 | 22 | 29 | 30 | 35 | 43 |
| Distance between centers (mm) | H1 | 8 | 10.5 | 15 | 21 | 24 | 29 | 38 |
| Download - 2D .dxf - COMING SOON | ||||||||
| Download - 3D .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:
| 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 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 | |
|---|---|---|---|---|---|
| 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.
