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Customizable Rubber Coupling for Coupling Spider in R82 OD78mm x ID31mm x T18mm in Black Color
Place of Origin | China |
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Brand Name | 3A Rubber |
Certification | ISO9001 |
Model Number | 3A2006 |
Minimum Order Quantity | 10pieces |
Price | USD10.00 |
Packaging Details | Packing in bags and cartons |
Delivery Time | 7-15days after receive the buyer's payment |
Payment Terms | L/C, D/P, T/T, Western Union, MoneyGram |
Supply Ability | 100000kgs/month |

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xMaterial | Rubber | Color | Black |
---|---|---|---|
Application | Insert To Metal Coupling | Type | OMT R42-132 |
Packing | In Cartons | Surface | Smooth |
Max Torque | 4 N.m | Ozone Resistance | Good |
Tensile Strength | 20Mpa | Uv Resistance | Good |
Standard Or Nonstandard | Standard | Durability | High |
Hardness | 70-80 Shore A | Abrasion Resistance | High |
Shape | Coupling | Chemical Resistance | Excellent |
Oil Resistance | Good |
Customizable Rubber Coupling for Coupling Spider in R82 OD78mm x ID31mm x T18mm in Black Color
OMT Rubber Coupling Spider, Rubber Spider, Couping Spider
black color rubber material
R42, OD42mm x ID19mm x T14mm
R62, OD59mm x ID29mm x T16mm
R82, OD78mm x ID31mm x T18mm
R103, OD99mm x ID42mm x T21mm
R132, OD132mm x ID64mm x T26mm
1. OTM Octagonal Coupling (Jaw Coupling / Plum Blossom Coupling)
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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).
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Working Principle: Torque is transmitted through the rubber plum blossom pad between the lobes, utilizing rubber's elasticity to:
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Absorb shock and vibration.
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Compensate for misalignment: Accommodates minor axial, radial, and angular offsets.
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Provide electrical insulation.
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Applications: Widely used in drive systems for pumps, fans, compressors, motors, gearboxes, etc.
2. Core Component: Rubber Cushion Block / Elastic Element / Plum Blossom Pad
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Function: The core damping element, directly impacting coupling performance.
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Names: Commonly called Plum Blossom Pad (due to its shape), Cushion Block, Elastic Element, or Cushion Ring.
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Material: Typically Polyurethane (PU) or Nitrile Rubber (NBR):
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Polyurethane (PU): Wear-resistant, tear-resistant, high load capacity (most common).
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Nitrile Rubber (NBR): Excellent oil resistance (suitable for oily environments).
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Model Identification:
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R42
,R62
,R82
,R103
,R132
, etc., are specification models of the plum blossom pad. -
Numbers typically indicate the coupling size or bore diameter range (unit: mm) they are designed for.
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3. Reference for Common Plum Blossom Pad Models & Specifications
Below are typical specifications for common models (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 |
4. Key Points for Purchase & Replacement
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Identify Original Model:
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Remove the old pad and check for stamped model (e.g., R42).
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Measure key dimensions: Outer Diameter (OD), Inner Diameter (ID), Thickness (H), Number of Lobes (usually 6 or 8).
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Match Coupling Specifications:
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The pad model MUST correspond to the coupling body model.
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Consider Operating Conditions:
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Torque & Speed: Ensure the pad can handle the load.
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Environment: Choose NBR for oily conditions; wear-resistant PU for general use.
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Temperature: Confirm the rubber's temperature tolerance.
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Brand & Quality:
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OEM parts offer best compatibility. Reputable brands (e.g., R+W, KTR, Lovejoy, OTM) provide higher reliability.
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5. Replacement Steps (Simplified)
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Shut down equipment and isolate power (safety first).
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Remove coupling guard.
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Loosen coupling bolts.
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Remove old pad and clean mating surfaces.
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Insert new plum blossom pad into the lobes of one half-coupling.
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Align the other half-coupling and gently push together.
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Tighten bolts diagonally to the specified torque.
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Reinstall guard.
Summary
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OTM octagonal couplings rely on plum blossom pads (e.g., R42/R62/R82/R103/R132) for cushioning.
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Precisely match the model and dimensions during replacement, considering operational needs.
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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!