Overview - TL1, TL2 & TL3 Mechanical Torque Limiters
Advantages
- Sustains torque level
- Durable
- High torque in a small size
- Predictable dynamic and static torque
- Easily adjustable over a wide range
- Superior adjustment retention
- Designed for easy rebuilt with no special tools required
- Steel-on-bronze friction discs provide longer life than fiber discs
Operation
- Torque range 1 lb. ft.- 2000 lb. ft.
- Can be pre-set to transmit torque constantly regardless of the speed of the drive mechanism
- Adjusting nut on end of hub regulates spring pressure against multiple steel-on-bronze friction disc assembly
Customization
- Multiple sizes from 2-3/16" to 8 5/8" O.D.
- Internal Flange Drive Cup sold separately
- Custom designs and alterations available
Applications
- Machine tools
- Conveyor systems
- Off-highway mobile equipment
- In textile or paper mills
Additional Information
OTHER CJM MECHANICAL CLUTCHES
- Multiple Disc Mechanical Clutch (MMS/MMD)
- Disc Pac Modules (MDP)
- Overload Release Mechanical Clutch (MOR & ORI)
Connect With CJM
Multiple Disc Mechanical Torque Limiters
(TL1, TL2 & TL3)
Carlyle Johnson's MAXITORQ® mechanical torque limiters provides protection against overloads while sustaining torque, so that shutdown and restart is not required. Acting like a torsion shock absorber to permit "slip" if the torque exceeds an adjustable pre-set level, these units are used in any application where obstructions can cause overloads, or where production is sensitive to over-tensioning.
The TL1, TL2 and TL3 model multiple disc mechanical torque limiters are often utilized in applications such as machine tools, conveyor systems, off-highway mobile equipment, in textile or paper mills.
CJM engineers can design and produce a custom mechanical torque limiter clutch or brake to meet your exact needs, and we can alter our standard torque limiters to achieve your requirements. Our engineering department is ready for your toughest power transmission challenge.
Features of Multiple Disc Torque Limiter Clutch & Brake Units
Depending on size, CJM mechanical torque limiters are adjustable over a wide torque range from 1lb.ft. to 2000 lb. ft. Small space-saver sizes - from 2-3/16" to 8-5/8" O.D. - and high torque potential make them the best possible choice for applications where obstructions can cause temporary overloads or where over-tensioning is a problem.
Unlike our overload release clutches, which automatically cut the torque from full to zero, a torque limiter clutch / brake acts as a torsion shock absorber to permit "slip" if torque exceeds an adjustable pre-set level. CJM multiple disc mechanical torque limiters are available in multiple models.
- TL1 / Type 1
A cut-off coupling designed to join two shafts, the TL1 torque limiter clutch / brake transits torque from one shaft to the other. - TL2 / Type 2
A cut-off coupling designed to join two shafts, the TL2 unit transits torque from one shaft to the other. - TL3 / Type 3
A sprocket drive, TL3 torque limiters typically mount on the motor shaft as an integral part of the drive mechanism.
Specifications / Dimensions
| TL1 Torque Limiter Clutch / Brake Chart A | ||||||||
| Model | Torque Adj. Range (lb. ft.) | Std. Bores (+.001) | Std. Bores (-.001) | Keyway | A |
B |
C |
Q |
| TL1-0020 | 0-10 | 1/2 | 5/8 | 1/8 x 1/16 | 1.250 | 2.188 | 1.438 | 0.188 |
| TL1-0021 | 10-25 | 3/4 | 7/8 | 3/16 x 3/32 | 1.625 | 2.188 | 1.250 | 0.125 |
| TL1-0022 | 25-50 | 1 | 1 1/8 | 3/16 x 3/32 | 2.125 | 2.625 | 1.594 | 0.125 |
| TL1-0023 | 50-100 | 1 1/4 | 1 3/8 | 1/4 x 1/8 | 2.125 | 3.500 | 1.063 | 0.188 |
| TL1-0024 | 100-175 | 1 1/2 | 1 5/8 | 5/16 x 5/32 | 2.125 | 4.000 | 2.344 | 0.188 |
| TL1-0025 | 175-300 | 1 3/4 | 1 7/8 | 3/8 x 3/16 | 2.750 | 4.500 | 2.688 | 0.188 |
| TL1-0026 | 300-500 | 2 | 2 1/4 | 7/16 x 7/32 | 3.250 | 5.500 | 3.250 | 0.188 |
| TL1-0027 | 500-1000 | 2 1/2 | 2 3/4 | 9/16 x 9/32 | 4.000 | 7.000 | 5.125 | 0.063 |
| TL1-0028 | 1000-1500 | 2 3/4 | 3 | 9/16 x 9/32 | 4.625 | 8.000 | 5.500 | 0.000 |
| TL1 Torque Limiter Clutch / Brake Chart B | |||||||
| Model | Driving Lugs GM |
Driving Lug Width GM |
SM |
VM |
Cup I.D. | Cup O.D. | Cup Screws Bolt Circle |
| TL1-0020 | 3 | .615 | 1.984 | 2.188 | 2.017 - 2.015 | 3.125 - 3.123 | 3 1/4 x 2 9/16 |
| TL1-0021 | 3 | .615 | 1.984 | 2.188 | 2.017 - 2.015 | 3.125 - 2.123 | 3 1/4 x 2 9/16 |
| TL1-0022 | 3 | .740 | 2.484 | 2.750 | 2.517 - 2.515 | 3.625 - 3.623 | 3 1/4 x 3 1/16 |
| TL1-0023 | 3 | .990 | 3.234 | 3.563 | 3.627 - 3.625 | 4.625 - 4.623 | 3 5/16 x 4 7/16 |
| TL1-0024 | 3 | .990 | 3.734 | 4.063 | 3.767 - 3.765 | 5.125 - 5.123 | 3 5/16 x 4 7/16 |
| TL1-0025 | 8 | .740 | 4.484 | 4.875 | 4.517 - 4.515 | 6.125 - 6.123 | 4 3/8 x 5/16 |
| TL1-0026 | 12 | .615 | 5.484 | 5.875 | 5.517 - 5.515 | 7.125 - 7.120 | 6 3/8 x 6 1/4 |
| TL1-0027 | 12 | .740 | 6.984 | 7.500 | 7.017 - 7.015 | 9.125 - 9.120 | 6 1/2 x 8 1/16 |
| TL1-0028 | 12 | .740 | 7.984 | 8.500 | 8.017 - 8.015 | 10.125 - 10.120 | 6 1/2 x 9 1/16 |
| TL2 Torque Limiter Clutch / Brake Chart A | ||||||||||
| Model | Torque Adj. Range (lb. ft.) | Bores (+.001) | Bores (-.001) | Keyway | A |
B |
Hub Bore Min. C |
Hub Bore Max. C |
L1 |
L2 |
| TL2-0020 | 0-10 | 1/2 | 5/8 | 1/8 x 1/16 | 2.125 | 2.188 | .375 | .750 | 1.625 | .438 |
| TL2-0021 | 10-25 | 3/4 | 7/8 | 3/16 x 3/32 | 2.625 | 2.188 | .500 | 1.000 | 11.313 | .563 |
| TL2-0022 | 25-50 | 1 | 1 1/8 | 3/16 x 1/16 | 3.375 | 2.781 | .625 | 1.250 | 2.688 | .563 |
| TL2-0023 | 50-100 | 1 1/4 | 1 3/8 | 1/4 x 1/8 | 3.500 | 3.563 | .875 | 1.500 | 2.688 | .688 |
| TL2-0024 | 100-175 | 1 1/2 | 1 5/8 | 5/16 x 5/32 | 3.750 | 4.063 | 1.000 | 1.750 | 2.813 | .813 |
| TL2-0025 | 175-300 | 1 3/4 | 1 7/8 | 3/8 x 3/16 | 4.625 | 4.875 | 1.250 | 2.000 | 3.563 | .938 |
| TL2-0026 | 300-500 | 2 | 2 1/4 | 7/16 x 7/32 | 5.625 | 5.875 | 1.750 | 2.500 | 4.188 | 1.375 |
| TL2-0027 | 500-1000 | 2 1/2 | 2 3/4 | 9/16 x 9/32 | 7.500 | 7.500 | 2.000 | 3.250 | 5.375 | 2.000 |
| TL2-0028 | 1000-1500 | 2 3/4 | 3 | 9/16 x 9/32 | 8.500 | 8.500 | 2.000 | 3.500 | 6.125 | 2.250 |
| TL3 Torque Limiter Clutch / Brake Chart A | ||||||||
| Model | Torque Adj. Range (lb. ft.) | Std. Bores (+.001) | Body Bores (-.001) | Keyway Bores | A |
B |
C |
Screws |
| TL3-0020 | 0-10 | 1/2 | 5/8 | 1/8 x 1/16 | 2.438 | 3.125 | 1.000 | 3 |
| TL3-0021 | 10-25 | 3/4 | 7/8 | 3/16 x 3/32 | 3.000 | 3.125 | 1.250 | 3 |
| TL3-0022 | 25-50 | 1 | 1 1/8 | 3/16 x 3/32 | 4.000 | 3.625 | 1.625 | 3 |
| TL3-0023 | 50-100 | 1 1/4 | 1 3/8 | 1/4 x 1/8 | 4.000 | 4.625 | 1.750 | 3 |
| TL3-0024 | 100-175 | 1 1/2 | 1 5/8 | 5/16 x 5/32 | 4.125 | 5.250 | 2.000 | 3 |
| TL3-0025 | 175-300 | 1 3/4 | 1 7/8 | 3/8 x 3/16 | 4.625 | 6.500 | 2.313 | 4 |
| TL3-0026 | 300-500 | 2 | 2 1/4 | 7/16 x 7/32 | 5.750 | 7.125 | 2.813 | 6 |
| TL3-0027 | 500-1000 | 2 1/2 | 2 3/4 | 9/16 x 9/32 | 7.125 | 9.125 | 4.000 | 6 |
| TL3-0028 | 1000-1500 | 2 3/4 | 3 | 9/16 x 9/32 | 7.500 | 10.125 | 4.500 | 6 |
| TL3 Torque Limiter Clutch / Brake Chart B | ||||||
| Model | Screw Size | B.C. D |
Max. Q |
Sprocket Min. Pitch Dia. | Cup Locating Dia. I.D. J |
Dim. Cup-Body Shoulder S |
| TL3-0020 | 1/4 | 2 9/16 | .750 | 4.000 | 2.017 - 2.015 | 0.094 |
| TL3-0021 | 1/4 | 2 9/16 | 1.000 | 4.250 | 2.017 - 2.015 | 0.063 |
| TL3-0022 | 1/4 | 2 1/16 | 1.250 | 4.750 | 2.517 - 2.515 | 0.063 |
| TL3-0023 | 1/4 | 3 5/16 | 1.250 | 5.625 | 3.267 - 3.265 | 0.063 |
| TL3-0024 | 1/4 | 4 7/16 | 1.250 | 6.250 | 3.767 - 3.765 | 0.063 |
| TL3-0025 | 3/8 | 5 1/2 | 1.250 | 7.500 | 4.517 - 4.515 | 0.063 |
| TL3-0026 | 3/8 | 6 1/4 | 1.750 | 8.500 | 5.517 - 5.515 | 0.125 |
| TL3-0027 | 1/2 | 8 1/16 | 2.000 | 10.000 | 7.017 - 7.015 | 0.063 |
| TL3-0028 | 1/2 | 9 1/16 | 2.000 | 11.250 | 8.015 - 8.015 | 0.063 |