We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black EPDM rubber sleeve coupling insert with split one-piece design

Tb Wood'S

Tb Wood'S 4JES Sure-Flex Sleeve Coupling Insert, EPDM Rubber

SKU CH-27MF-865J2

EPDM rubber sleeve coupling insert for Wood's 4JS 4JES size 4 couplings, rated to 7,600 RPM and 156 in-lb torque with 1 degree angular and .01 in parallel misalignment capacity

  • EPDM rubber resists heat up to 275 °F
  • One-piece split sleeve allows quick installation
  • Handles 7,600 RPM for high-speed drives
  • Transmits 156 in-lb torque at 0.25 hp
  • Accepts 1° angular and .01 in parallel misalignment

What this sleeve coupling insert is and who needs it

The Tb Wood'S 4JES Sure-Flex sleeve coupling insert is a one-piece split EPDM rubber element designed for coupling size 4. It suits maintenance teams and OEMs fitting or replacing flexible couplings on blowers, compressors, conveyors, mixers, motors and pumps where vibration damping and misalignment tolerance are required.

Check shaft alignment

Verify that the connected shafts stay within one degree of angular misalignment and 0.01 inch of parallel offset. Confirm the driver speed does not exceed 7,600 RPM and that the application torque remains below 156 in-lb. The insert operates up to 275 degrees Fahrenheit, so ambient and process temperatures must stay within that limit.

How it behaves under continuous operation

At 100 RPM the insert transmits 0.25 horsepower with a torsional stiffness of 458 in-lb/rad, giving predictable torque response during steady running. EPDM construction resists heat ageing and ozone, so the damping characteristics remain stable over long duty cycles rather than softening after a short burst.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 87% of the 693 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

What comes with the 4JES sleeve coupling insert and is any hardware sold separately?

The package contains the one-piece split EPDM rubber insert for coupling size 4. Mounting hubs, fasteners and any shaft hardware are not included and must be purchased separately.

How do I decide whether the 4JES insert matches my application?

Choose this insert when the drive runs up to 7,600 RPM, torque stays at or below 156 in-lb, and the motor delivers roughly 0.25 hp at 100 RPM. It handles 1 degree angular and 0.01 in parallel misalignment, and suits blowers, compressors, conveyors, mixers, motors and pumps.

What does the 156 in-lb torque rating mean once the insert is installed?

It is the maximum continuous torque the EPDM element can transmit at the rated speed. Exceeding it risks premature wear or failure, so size the motor and driven load so peak torque stays under 156 in-lb.

More in Bearings, Belts & Drive Components

Similar items