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Cast iron Sure-Flex flange hub, 1-3/8 inch bore, keyed, 5 29/64 inch OD

Tb Wood'S

Tb Wood'S 8S138 Sure-Flex sleeve coupling flange 8S bore 1-3/8 in

SKU CH-7E54-49ZYP

Cast-iron flange hub for 8S Sure-Flex couplings, 1-3/8 in bore, rated to 4 500 RPM and 1 475 in-lb torque

  • Handles 4 500 RPM for high-speed drives
  • Transmits 1 475 in-lb torque for heavy loads
  • 1-3/8 in bore fits standard shafts directly
  • Cast-iron hub resists wear in tough service
  • ±.0005/.0015 in tolerance ensures precise alignment

1-3/8 in bore flange for Sure-Flex 8S

This cast-iron flange hub fits Sure-Flex coupling size 8 and accepts a 1-3/8 inch round keyed bore. It is intended for compressors, conveyors, motors and pumps that require a secure shaft connection. The hub body length is 3/4 in and the overall length through the bore is 2 3/32 in.

4 500 RPM rating with 1 475 in-lb torque

The flange is rated for a maximum speed of 4 500 RPM and a maximum torque of 1 475 in-lb. Cast-iron construction provides rigidity for continuous power transmission in industrial machinery. Bore tolerance of +0.0005 in to +0.0015 in ensures a precise fit on the shaft.

5 29/64 in outside diameter

The outside diameter of 5 29/64 in and hub diameter of 3 1/4 in define the space required for installation. No bushing is used with this flange hub, so the bore mounts directly to the shaft. Buyers needing a different bore size or a bushed hub must select another part.

How it compares

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

Price $44.99
Pricier than about 60% of the 693 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 8S flange on a 1-3/8 in shaft and what step is often missed?

Press the flange onto the shaft within the +0.0005 to +0.0015 in bore tolerance, insert the key into the keyway, then secure with the set screw; the step often missed is verifying the key seats fully before tightening.

What maintenance or replacement will the 8S138 flange need over time?

The cast-iron flange itself requires no routine maintenance; inspect the key and set screw for wear during scheduled downtime and replace the Sure-Flex sleeve element when it shows cracking or deformation.

What limit appears first when the 8S flange runs continuously at high load?

The 1,475 in-lb torque rating is the primary limit; exceeding it will cause sleeve failure before the 4,500 RPM speed limit becomes a factor.

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