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When misalignment, vibration, or torque shock threatens your drive system, a rigid coupling simply isn't enough. Engineers, machinists, and DIY builders working on CNC routers, servo motor assemblies, hydraulic pump drives, and industrial automation need a coupling that absorbs shock, compensates for minor angular and parallel misalignment, and holds tight under continuous load. This D55 xL95 jaw spider flexible shaft coupling is designed for exactly those demanding scenarios.
The coupling body is machined from aluminum alloy with a spider (plum) elastomeric insert seated between the two hubs. The outer diameter is 55mm (≈2.17 in) and the overall assembled length is 95mm (≈3.74 in). Bore sizes d1 and d2 are independently selectable from 14mm up to 28mm (≈0.55–1.10 in), letting you match two different shaft diameters in a single unit. The splined jaw interface distributes torque evenly across all spider lobes.
Typical use cases include CNC spindle-to-motor connections requiring low backlash, pump-to-gearbox shaft coupling in fluid handling systems, and servo/stepper motor shaft connections in 3D printers and laser cutters where vibration damping extends component life.
| Outer Diameter (OD) | 55mm (≈2.17 in) |
|---|---|
| Overall Length (L) | 95mm (≈3.74 in) |
| Bore d1 Range | 14mm – 28mm (≈0.55–1.10 in) |
| Bore d2 Range | 14mm – 28mm (≈0.55–1.10 in) |
| Hub Material | Aluminum alloy |
| Spider Insert Material | Polyurethane elastomer |
| Coupling Type | Jaw / Spider (Plum) flexible coupling |
| Bore Tolerance | See variant options |
| Max Torque Capacity | See variant options |
| Max RPM | See variant options |
| Keyway | See variant options |
| Set Screw | See variant options |
| Pack Quantity | 1 pcs or 3 pcs (select above) |
Measure the outer diameter of each shaft you need to connect. d1 is the bore for shaft 1 and d2 is the bore for shaft 2. Both are independently selectable from 14mm to 28mm. If both shafts are the same diameter (e.g., both 20mm), select d1 = d2 = 20mm. If they differ (e.g., 17mm motor shaft and 20mm pump shaft), select d1 = 17mm and d2 = 20mm. Always verify shaft diameter with calipers before ordering.
Yes. The jaw spider design with an elastomeric insert accommodates minor angular misalignment (typically up to 1°) and small amounts of parallel offset. It is not intended for large misalignment — for best results, align shafts as closely as possible and use the coupling to absorb residual misalignment and vibration.
Yes. The splined jaw interface provides low backlash, which is important for positional accuracy in CNC and servo systems. The spider insert also damps vibration that can otherwise cause resonance in lightweight machine frames. This coupling is widely used on CNC routers, laser cutters, and 3D printer Z-axis lead screw connections.
The spider insert is made of polyurethane elastomer, which provides a balance of flexibility, durability, and chemical resistance. In most jaw couplings of this design, the spider insert is a separate component seated between the two hubs and can be replaced independently when worn, without replacing the entire coupling assembly.
The aluminum alloy hubs have inherent oxidation resistance and perform well in typical workshop and light industrial environments. For prolonged exposure to moisture, salt spray, or aggressive chemicals, consider applying a protective coating or anodizing. The polyurethane spider insert is resistant to oils and mild chemicals.
Fastening method (set screw, keyway, or clamping) depends on the specific variant. Please refer to the product images or contact us to confirm the fastening configuration for your selected bore combination before ordering.
The QTY option lets you choose between a single unit (1 pcs) for a single-axis replacement or repair, or a 3-pack (3 pcs) for multi-axis machine builds, production setups, or keeping spares on hand. The bore size selection applies to all units in the pack.
