The S50HWWM20P0404 is a one-piece, zero-backlash helical coupling made of 17-4PH stainless steel, designed to transmit torque while compensating for angular, lateral, and axial misalignment. It has a bore diameter of 4 mm, a nominal outer diameter of 20 mm, and a length of 15 mm, with an M3 set screw for shaft retention. The coupling supports a maximum momentary torsional torque of 2.6 N·m, with ratings reduced to 1.3 N·m for nonreversing and 0.65 N·m for reversing applications. It provides constant velocity and high fatigue resistance, with a torsional inertia of 0.07 × 10⁻⁴ kg·cm² based on the smallest bore. Angular misalignment is rated up to 5°, lateral offset up to 0.25 mm, and axial motion ±0.25 mm.
Couplings Types
Couplings can be divided into two categories: flexible and rigid. Both types are used to connect two rotating shafts driven by a motor and transmit torque and angular velocity; however, flexible couplings and shafts are designed to accommodate angular misalignment, angular offset, axial movement, and a variety of load conditions. A flexible coupling is pliable due to the twisting and compression of a durable, adaptable material, like neoprene, rubber, or silicone.
Flexibility can also be achieved with thin metal disks, corrugated aluminum bellows (bellows couplings), or even a stainless-steel ball (miniature ball couplings). Some materials can provide vibration reduction, as in our precision flexible antivibration couplings.
Rigid couplings are limited by comparison; rigid couplings are used when shafts are already positioned in precise lateral and angular alignment. Their rigid design inhibits shaft misalignment. They can generally transmit more power than flexible couplings due to their rigidity.
Even the most complicated application challenges can be solved by our skilled engineers, they will identify the best coupling solution for your application. SDP/SI provides a comprehensive range of rigid and flexible couplings. Many of our precision couplings, including the Miniature Bellows Coupling and the Neo-Flex Coupling, have our patented Fairloc® Hub design, which solves phasing, timing, positioning, and frequent removal problems. For more about the easily adjustable Fairloc® hub design click here.
Precision Magnetic Disk Couplings
Precision Flexible Bellows Couplings
Precision Miniature Ball Couplings
Precision Flexible Antivibration Couplings
| Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|
| Product Category | Flexible Couplings |
| Product Number | S50HWWM20P0404 |
| Product Name | One Piece Zero Backlash Constant Velocity, Pin Hub Helical Coupling |
| Coupling Type | Helical / Slit |
| Rated Torque | 11.5 In-lbs (13.27 kg-cm) |
| Units | Metric Design |
| Bore Diameter | 0.1575 inch (4 mm) |
