Ruland Manufacturing
Ruland Manufacturing JD16/25-85B Urethane Spider 15 In-Lbs
Urethane spider for jaw couplings rated at 15 in-lb torque and 8,000 RPM maximum speed
- Handles 15 in-lb torque for reliable power transmission
- Polyurethane spider with 85A durometer resists wear and vibration
- Operates up to 8,000 RPM for high-speed applications
- Accommodates 1° angular and 0.006 in parallel misalignment
- Fits JC16 and MJC25 hub series for easy integration
Jaw coupling insert for JC16 and MJC25 hubs
This polyurethane spider fits Ruland jaw coupling hubs JC16, JCC16, JS16, JSC16, MJC25, MJCC25, MJS25 and MJSC25. It transmits torque between shafts in inch-system machinery where a one-inch outside diameter is required. The 85A durometer urethane provides damping for vibration-prone drives.
Installs between two matching hubs to complete
No lubrication is needed and the spider absorbs 0.006 inch parallel offset, 0.03 inch axial motion and one degree angular misalignment. It frees the designer from precise shaft alignment while protecting bearings from shock loads. The blue insert is a direct replacement for worn spiders in existing assemblies.
Rated for continuous operation at 8,000 RPM
At 100 RPM the coupling transmits 0.0476 horsepower with a 15 inch-pound torque limit. The deform torque of 30 inch-pounds provides an overload margin before permanent damage occurs. Buyers needing higher torque capacity or a different durometer should select an alternative spider.
Highlights
- Handles 15 in-lb torque for reliable power transmission
- Polyurethane spider with 85A durometer resists wear and vibration
- Operates up to 8,000 RPM for high-speed applications
- Accommodates 1° angular and 0.006 in parallel misalignment
- Fits JC16 and MJC25 hub series for easy integration
Specifications
No published specifications for this item yet.
Questions about this item
What is the maximum torque before the 85A urethane spider permanently deforms?
The spider is rated for a maximum torque of 15 in-lb and a deform torque of 30 in-lb, so sustained loads above 15 in-lb risk permanent deformation.
How much heat and vibration should I expect when running this insert continuously at 8,000 RPM?
At 8,000 RPM the insert transmits 0.0476 hp at 100 RPM; the 85A polyurethane dampens vibration, but continuous high-speed operation will generate measurable heat in the jaws.
Which coupling hubs must I already have for this JD16/25-85B spider to fit?
It fits Ruland hubs with part numbers JC16, JCC16, JS16, JSC16, MJC25, MJCC25, MJS25 or MJSC25 — all share the same 1-inch outside diameter.
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