Customizable Rubber Coupling Spider with OD78mm x ID31mm x T18mm Dimensions and 70-80 Shore A Hardness for Max Torque 4 N.m
Price:
USD10.00
MOQ:
10pieces
Delivery Time:
7-15days after receive the buyer's payment
Brand:
3A Rubber
Product Description
Customizable Rubber Coupling for Coupling Spider
R82 OD78mm × ID31mm × T18mm in Black Color
OMT Rubber Coupling Spider, also known as Rubber Spider or Coupling Spider, available in black rubber material.
Available sizes:
- R42, OD42mm × ID19mm × T14mm
- R62, OD59mm × ID29mm × T16mm
- R82, OD78mm × ID31mm × T18mm
- R103, OD99mm × ID42mm × T21mm
- R132, OD132mm × ID64mm × T26mm
OTM Octagonal Coupling (Jaw Coupling / Plum Blossom Coupling)
Structural Features
Consists of two metal half-couplings with convex lobes (typically 8 lobes, forming an octagonal shape) and a central rubber elastomer (plum blossom pad).
Working Principle
Torque is transmitted through the rubber plum blossom pad between the lobes, utilizing rubber's elasticity to:
- Absorb shock and vibration
- Compensate for misalignment: Accommodates minor axial, radial, and angular offsets
- Provide electrical insulation
Applications
Widely used in drive systems for pumps, fans, compressors, motors, gearboxes, and other industrial equipment.
Core Component: Rubber Cushion Block / Elastic Element
Function
The core damping element, directly impacting coupling performance. Also known as Plum Blossom Pad (due to its shape), Cushion Block, Elastic Element, or Cushion Ring.
Material Options
- Polyurethane (PU): Wear-resistant, tear-resistant, high load capacity (most common)
- Nitrile Rubber (NBR): Excellent oil resistance (suitable for oily environments)
Model Identification
Specification models (e.g., R42, R62, R82, R103, R132) typically indicate the coupling size or bore diameter range (unit: mm) they are designed for.
Common Plum Blossom Pad Models & Specifications
Note: Standards may vary slightly between manufacturers. Always verify with physical measurements or the manufacturer's selection chart!
| Pad Model | Typical Bore Dia. Range (mm) | Suitable Coupling Size/Torque Range |
|---|---|---|
| R42 | ≈ 20 - 30 | Small couplings, low torque |
| R62 | ≈ 25 - 40 | Small-to-medium couplings |
| R82 | ≈ 40 - 60 | Medium couplings |
| R103 | ≈ 50 - 75 | Medium-to-large couplings |
| R132 | ≈ 70 - 100+ | Large couplings, high torque |
Key Points for Purchase & Replacement
- Identify Original Model: Remove the old pad and check for stamped model (e.g., R42). Measure key dimensions: Outer Diameter (OD), Inner Diameter (ID), Thickness (H), Number of Lobes (usually 6 or 8).
- Match Coupling Specifications: The pad model MUST correspond to the coupling body model.
- Consider Operating Conditions: Ensure the pad can handle the torque & speed requirements. Choose NBR for oily conditions; wear-resistant PU for general use. Confirm the rubber's temperature tolerance.
- Brand & Quality: OEM parts offer best compatibility. Reputable brands (e.g., R+W, KTR, Lovejoy, OTM) provide higher reliability.
Replacement Steps (Simplified)
- Shut down equipment and isolate power (safety first).
- Remove coupling guard.
- Loosen coupling bolts.
- Remove old pad and clean mating surfaces.
- Insert new plum blossom pad into the lobes of one half-coupling.
- Align the other half-coupling and gently push together.
- Tighten bolts diagonally to the specified torque.
- Reinstall guard.
Summary
OTM octagonal couplings rely on plum blossom pads (e.g., R42/R62/R82/R103/R132) for cushioning. Precisely match the model and dimensions during replacement, considering operational needs. Source pads through official channels or contact OTM suppliers with parameters for procurement.
Please provide the dimensions of your old part or your equipment model for precise pad specification confirmation!
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
SANHE 3A RUBBER & PLASTIC CO., LTD.
Location
45 Hualian Golden Street, Sanhe Hebei China
Contact Person
Shiguo Han