When the equipment encounters stalling, material jamming, impact loads, or sudden overload during operation, the Gearbox Torque Limiter instantly slips to release the overload torque and disconnect the drive. This effectively protects the gearbox gears, drive shafts, bearings, and the entire transmission structure, completely eliminating major failures such as shaft breakage, gear tooth fracture, and housing cracking, thereby significantly reducing equipment downtime and maintenance costs.
- The safety coupling is made of fully turned steel, and the shims are manufactured using a full turning process.
- The torque limiter surface undergoes standard phosphate treatment.
- Compact solution.
- This model is suitable for IEC motors.
- Bidirectional protection.
- Instant disengagement in case of overload.
- Fast and simple calibration using our "H" dimensional program.
- Units are calibrated and ready for immediate use.
- Friction discs can be manufactured from different materials with various properties to meet specific requirements.
- Custom versions are available with various anti-corrosion treatment options.
- Ball-type models are suitable for NEMA motors.
The safety coupling is installed between the motor and gearbox via a B5 flange adapter. It is available in slipping (DF/TAQ/PR-V) and disengaging (JTA/TA-SR) versions.
The required equipment dimensions for the space between the motor and gearbox are compact, resulting in lower costs.
Conveyors.
Packaging machinery.
Strapping machinery.
Lifting and positioning motor systems.
Compared with gearbox-integrated solutions, this model features a simpler structure and higher sensitivity.
Protects motor gearboxes from accidental collisions or impacts caused by processed products.
Significantly reduces production downtime in the event of overload.
Absorbs static torque without disengagement (friction-type models).
JTA/JTA-SR: Backlash-free ball-type coupling version,installed between the motor and gearbox.
Max. torque: 3-720 Nm
Bore diameter: up to 48 mm per shaft
DF/TAC/PR-V: Friction-type chain coupling version, installed between the motor and gearbox.
Torque range: 1-1200 Nm
Max. bore diameter: 55 mm per shaft
DF/PR: Friction type, directly mounted inside the hollow shaft gearbox output.
Max. torque: 1-2600 Nm
Bore diameter: 65 mm
Max. shaft diameter: 55 mm
- Ball-type solution; backlash-free transmission in the negative version, maintenance-free.
- Instant disengagement of driving and driven components in case of overload.
- Single-point (360°) re-engagement possible.
- Equipped with connecting flanges made of galvanized steel, a complete solution for IEC motors.
- Can be fitted with sensors to monitor overload conditions.
- Torque range: 3–720 Nm; max. bore diameter per shaft: Φ48 mm.
Overall Dimensions and Technical Features Of Gearbox Torque Limiter
Assembly Examples
▲ On request Notes ■
● Maximum speed*: For JTA/JTA-SR models in size 4.138 with T4 spring configuration, the maximum speed is 1500 rpm.
- Compact and cost-effective solution.
- Torque setting can be adjusted by slipping the drive components without disconnecting the drive train.
- Noiseless operation, vibration-free.
- Complete solution for IEC motors with aluminum connection flanges.
- Can be equipped with sensors to monitor overload conditions (DF/TAC/PR-V/S).
- Torque range: 1–1200 Nm; max. bore diameter per shaft: Φ55 mm.
Overall Dimensions and Technical Features
Assembly Example
▲ On request
● D H7*: The torque limiter is equipped with a reduced keyway.
● Weight refers to the torque limiter pilot bore.
- Can be fitted with friction linings of different properties to meet specific requirements.
- Special design, suitable for installation on gearboxes with hollow output shafts.
- Can be equipped with a full set of fully turned drive components.
- Can be fitted with radial locking nuts (.../GR).
- Gearbox versions are equipped with chain couplings for coaxial connection (DF/TAC/PR).
- Torque range: 1–2600 Nm; max. shaft diameter: Φ55 mm; max. bore diameter: Φ65 mm.
Overall Dimensions
Technical Features
▲ On request
● Weight refers to the pilot bore of the torque limiter.
Q1: Which series are included in this Gearbox Torque Limiter product line, and what are the differences between them?
A: Our company's specialized gearbox torque limiters are primarily categorized into three main series, designed to accommodate various mounting structures and protection modes:
The JTA/JTA-SR series features a zero-backlash steel ball disengagement mechanism; upon overload, the driving and driven ends completely disengage. It covers a torque range of 3–720 Nm, with a maximum bore diameter of 48 mm.
The DF/TAC/PR-V series utilizes a friction-slip chain structure, capable of sustaining static torque loads without disengaging. It offers a torque range of 1–1200 Nm, with bore diameters reaching up to 55 mm.
The DF/PR series can be directly embedded and mounted onto the output shaft of hollow-shaft gearboxes. Specific models support torque capacities of up to 2600 Nm, making them ideal for high-torque, heavy-duty gearbox applications.
Q2: Which motor specifications are compatible, and what mounting positions are supported?
A: All series come standard with aluminum alloy connection flanges, providing native compatibility with mainstream IEC-standard motors available on the market; the steel-ball models can also be customized to fit NEMA-standard motors. Typically, there are two mounting methods: they can be installed between the motor and the gearbox using a B5 flange adapter, or—in the case of the specialized DF/PR models—they can be directly embedded and assembled onto the output shaft of a hollow-shaft gearbox. The overall structure is compact, requiring no excessive installation space; furthermore, retrofitting existing equipment requires no major modifications to the existing transmission structure.
Q3: How is the device reset after an overload event, and is the torque threshold adjustment process complicated?
A: The disengagement-type versions support 360° single-point alignment resetting, offering simple and convenient operation. The friction-type versions provide continuous slipping to buffer against overload conditions. The products feature an exclusive "H-dimension" calibration procedure, allowing for torque calibration to be completed simply by sliding the transmission components—without the need to disassemble the entire transmission train.
Q4: What is the surface finish and material quality like?
A: The Gearbox Torque Limiter is precision-machined from solid steel, featuring an integrally turned spacer; its surface undergoes a standardized phosphating treatment for rust prevention. The flange components are constructed from galvanized steel, offering high corrosion resistance.
Q5: Do you offer personalized customization services?
A: Yes, our company offers a wide range of non-standard customization services to meet specific requirements. Friction linings with varying properties can be interchanged to suit specific customer operating conditions. The corrosion-resistant treatment process has been enhanced to accommodate use in humid or corrosive specialized workshop environments. Each unit is factory-calibrated for torque, allowing for immediate installation and operation upon delivery, thereby eliminating the need for on-site commissioning. Furthermore, select models can be fitted with radial locking nuts or adapted with alternative connecting components to ensure comprehensive compatibility with a wide range of non-standard gearboxes and specialized operational equipment.
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No. 1068 Jinyang East Road, Lujia Town, Kunshan City, Jiangsu Province, China
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If you have any enquiry about quotation or cooperation, please feel free to email us at jiteng2009@126.com or use the following inquiry form.Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
