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Power transmission products are used in mechanical drivetrains to create movement. Components include linear motion slides and actuators, gearboxes, timing belts/pulleys/bushings, and a host of shaft couplings, bore reducers, and other purely mechanical devices.
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Mechanical Power Transmission
Category Selection
- Linear Motion Slides and Actuators
- Stepper Motor Linear Actuators
- Linear Guides and Rail Systems
- Precision Ground Linear Shafts / Bearings / Supports
- Aluminum Linear Shafts & Bearings
- Helical Racks and Pinions
- Worm Gearboxes
- Helical Gearboxes
- High-Precision Inline Strain Wave Gearboxes
- Precision Gearboxes for Servomotors
- Precision Gearboxes for Small NEMA Motors
- Timing Belts, Timing Pulleys & Tapered Tapered Bushings
- Drive Couplings
- Bore Reducers
Mechanical power transmission is the transfer of mechanical motion between two components. In most cases, the rotation of the primary mover is what causes the movement of the driven component. The driven component's movement may be rotational or linear based on application needs. Torque, speed, and direction may also be altered during this transfer of mechanical energy.
- Linear motion components are driven along a linear path by the rotational motion of an actuator
- Gearboxes provide power transmission between two geared shafts using the interlocking teeth of the primary and secondary gears
- Synchronous drives use belts and pulleys to transfer rotational motion from the primary shaft to the driven shaft(s)
- Shafts, bearings, reducers, and couplings are all used to facilitate mechanical power transmission in industrial machinery
For part listings and specifications, go to Shop Now
Linear Motion Slides and Actuators
Motor-ready linear actuators and sliding components turn rotary motion into linear motion, providing a variety of X-Y and X-Y-Z positioning system solutions. Options for mounting stepper or servo motors as well as a full selection of accessories are available to complete a linear motion system.
- Ball screw driven actuators - capable of high speeds and duty cycles
- Lead screw driven actuators - provide high performance for light or heavy loads at an economical price
- Belt driven actuators - provide simple, dependable motion along a longer axis
- Undriven linear slides - used in multi-axis systems and run parallel to a linear actuator of the same travel length, typically used to stabilize the X-axis
- XYZ gantry components in all four styles
Stepper Motor Linear Actuators
Stepper motor linear actuators are stepper motors that incorporate a lead screw as the rotor, which translates motor torque into linear thrust. These actuators are often used with undriven linear slides or linear shafts/linear supports.
- NEMA 17 and NEMA 23 frame units available in a range of lengths and lead screw pitches
- Up to 193 lbs of thrust and speeds up to 18 inches/second
- Extension cables and other accessories available
Linear Guides and Rail Systems
Newest Additions!
- LU series internal carriages and guide tracks
- LV series external carriages and guide tracks
Linear guides and rail systems are machine elements that support the movement of heavy objects in a straight line with minimal friction or resistance. Styles available include linear bearings and rails, and linear carriages and guides.
Linear bearings and rail products use continuously circulating ball bearings to provide high load capacities.
- Load ratings up to 74,600N (16,770lbf)
- Linear rails are available with rail lengths from 80 to 1000mm (3.2-39.4 in)
Linear carriage and guide products use V-shaped wheels to resist debris in dirty, dusty processes with ball bearings sealed inside the hub of the wheels. Internal and external carriage styles are available.
- Load ratings up to 4,700N (1,057lbf)
- Linear guides are available in lengths from 266 to 1,520mm (10.5-59.8in)
Precision Ground Linear Shafts / Bearings / Supports
Precision ground linear shafts, shaft supports, and bearings are a tight-tolerance means of supporting sliding linear loads while providing smooth operation with minimal maintenance. The shafts' surface finish is optimized for plain and ball bearings.
- Linear precision ground shafts in carbon steel or stainless steel
- Linear shaft bearings available in plain or ball bearing styles
- Linear shaft supports
Aluminum Linear Shafts & Bearings
Aluminum linear shafts and bearings offer a cost-effective means of supporting sliding linear loads while providing smooth, maintenance-free operation.
- Aluminum linear shafts
- Polymer linear shaft bearings
Helical Racks and Pinions
Rack and pinion systems are a type of linear actuator consisting of a rotating pinion that drives a linear rack, converting rotary motion to linear motion. Helical rack and pinion systems offer the most cost-effective installation for linear movements over 2 meters.
- Helical components are available with module pitches from 1.5 to 3.0
- Helical racks are available in 1-meter lengths, in tooth counts from 100 to 200 teeth
- Helical pinions are available in tooth counts from 18 to 40 teeth
Worm Gearboxes
Worm gearboxes (worm gear speed reducers) consists of a worm gear (spiraled shaft) that engages with and drives a toothed gear (worm wheel). These gearboxes will drive a load at a reduced fixed ratio of the motor speed. Output torque is increased by that same ratio, while horsepower is unchanged minus some efficiency losses. This category includes:
- Stainless steel worm gearboxes
- Cast iron worm gearboxes
- Aluminum worm gearboxes
- Worm gearbox accessories
Helical Gearboxes
Like worm gearboxes, helical gearboxes drive a load at a reduced ratio of motor speed. Output torque is increased; horsepower is unchanged minus some efficiency losses. Helical gearboxes utilize helical gears with teeth that are cut at an angle. This causes a gradual engagement of teeth between gears, providing quieter operation, greater load capacity, and higher speed capability. This category includes:
- Cast iron helical inline gearboxes
- Cast iron helical bevel gearboxes
- Helical gearbox accessories
High-Precision Inline Strain Wave Gearboxes
Strain wave gearboxes offer many advantages over planetary and helical gearboxes. Strain wave technology allows for a higher gear ratio and efficiency in an inline form-factor and smaller size. Many different gear ratios and output shaft sizes are available and are designed to work without SureServo2 and SureStepper motors.
- High gear ratios compared to similar-sized planetary gearboxes (up to 160:1 for stepper gearboxes and 200:1 for servo gearboxes)
- Low heat and noise generation
- Large selection of output shaft diameters
- Lifetime zero backlash
- Pre-lubricated for life
Precision Gearboxes for Servomotors
The PGA series of inline planetary gearboxes has a thread-in mounting style, along with a level of precision and torque capacity that is best in its class. The PGB series of right-angle planetary gear reducers offers similar technical specifications to the PGA series and provides an excellent solution when space and clearance requirements are limited. PGD series gearboxes with compact design and hub-style output are ideal for equipment that requires high-speed, high-precision indexing movement. The LS Electric MSS series of high precision gear reducers are specifically designed to mate to LS Electric L7C and L7P series servo motors.
- Thread-in mounting style
- Best-in-class backlash
- A range of gear ratios available
- Uncaged needle roller bearings for high rigidity and torque
Precision Gearboxes for Small NEMA Motors
The SureGear PGCN series is a great gearbox value for servo, stepper, and other motion control applications requiring a NEMA size input/output interface. It offers the best quality available for the price point. Features include:
- Wide range of ratios (5, 10, 25, 50, and 100:1)
- Low backlash of 30 arc-min or less
- 20,000 hour service life
- Maintenance free; requires no additional lubrication
- NEMA sizes 17, 23, and 34
- Includes hardware for mounting to SureStep stepper motors
- Optional shaft bushings available for mounting to other motors
Timing Belts, Timing Pulleys & Tapered Bushings
Timing pulleys, bushings, and belts allow speed and torque change while connecting mechanically rotating components.
- Timing (toothed) belts in MXL, XL, L, 5M, and 8M styles
- Timing pulleys in MXL, XL, L, and 5M styles
- Tapered bushings allow pulleys to connect to different shaft sizes
Drive Couplings
Drive couplings are used to couple the shafts of various mechanical devices and compensate for misalignment.
- Jaw/spider couplings
- Double loop couplings
- Oldham couplings
- Beam-style servo couplings
- High-gain servo couplings
Bore Reducers
Bore reducers for use in all SureMotion drive coupling hubs to adapt to smaller shaft sizes.
- Split-collar design with 2 set screw flats will not mark shaft
- 25% greater holding power than standard split collar
- Hardened stainless steel
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