The CR‑type PU spider insert is the elastomer spider cushion for Joong‑Ang (JAC) Korean‑standard jaw couplings. Manufactured with premium TPU, NBR, CSM/SBR or nylon, it delivers shock‑absorbing, vibration‑damping performance and compensates minor shaft misalignment for power‑transmission equipment. We maintain stock for standard CR‑series and support OEM custom‑molded inserts per drawings or samples. For enquiries, please confirm type, size number and quantity.

Key Features & Benefits

• Outstanding shock‑absorbing and vibration‑damping performance to protect driving‑end machinery
• Multiple elastomer grades: TPU / NBR / CSM‑SBR for wear‑resistant, oil‑resistant or anti‑aging working conditions
• Low compression‑set value, stable long‑time performance under cyclic load
• Strict Joong‑Ang Korean‑standard dimension, direct drop‑in replacement
• Wide hardness range of 70‑98 Shore A to match different torque requirements
• Support OEM custom hardness, dimension and color; lubrication‑free, low‑maintenance

Material Options

• TPU（Polyurethane）: High abrasion resistance & high mechanical strength, most popular material for CR spider inserts
• NBR: Good oil‑resistance for hydraulic‑related transmission environment
• CSM/SBR: Excellent anti‑aging performance for harsh working conditions

Application Fields

Designed for Joong‑Ang / JAC Korean‑standard jaw couplings. Widely used for pumps, fans, compressors, gear reducers, generator sets and general industrial motor‑drive transmission systems.

Item	Specification
Material	TPU, CSM/SBR, NBR, nylon etc.
Color	yellow, red, purple, green, black, beige etc.
Surface	smooth
Tensile strength	8‑55 Mpa
Hardness	70‑98 Shore A
Elongation	400%‑650%
Density	1.25 g/cm³
Elasticity impact	>25%
Tear strength	35‑155 KN/m
Akron abrasion loss	<0.05 cm³/1.61 km
Compression set (22h*70°C)	<10%
Max working temperature	120°C

Standard CR Series Sizes

Joong‑Ang CR Standard Sizes： CR0050, CR0070, CR0010, CR0020, CR2035, CR2035A, CR3545, CR4560, CR6070, CR7080

Custom Service & Packing

• OEM & Customized: Custom‑molded according to customer drawings or samples; adjustable hardness, dimensions and colors.
• Packing: Plastic bags, cartons, pallets or wooden crates.
• We also supply matching steel coupling hubs for Joong‑Ang series.

FAQ

Q1: What material is commonly used for Joong‑Ang CR spider insert? 

A: TPU is most widely‑used; NBR / CSM‑SBR for oil‑resistant and anti‑aging conditions.

Q2: Can you produce non‑standard custom CR elastomer inserts? 

A: Yes, OEM custom moulding service is available with drawings or physical samples.

Q3: What information do I need to provide for quotation? 

A: Please provide coupling type, CR size number and purchase quantity.