Skip to the beginning of the images gallery

Hi-Q Coupling Half, 1.38 Inch Bore, 5/16 Inch Key

Description & Features

Designed for various industrial applications this coupling half is precision ground and machined to maintain high accuracy and efficiency. With a 1.38 inch bore and 5/16 inch key it ensures optimal connection and performance. The coupling features a maximum angular offset capability of 1 and a maximum parallel offset capability of 0.015 inches providing reliable flexibility in alignment.

Manufactured by Maurey Manufacturing Co this durable coupling half is constructed from sintered metal or machined cast iron depending on the model size. It effectively prevents metal-to-metal contact compensating for minor misalignments. Fast installation and rust resistance are additional benefits that enhance its usability.

The coupling half operates efficiently within a temperature range of -20F to 180F with a Buna-N spider and -80F to 180F with a urethane spider. It is rated for 7.2 horsepower with Buna-N and 11.9 horsepower with urethane at 1800 RPM suitable for coupling hydraulic pumps to electric motors among other uses.

MPN: L100-1-3/8

Supplier Part Number: L100-1-3/8

Specifications

Coupling Size L100	For Use With Hi-Q® Flexible Couplings	Horsepower Rating Buna-N: 7.2 hp, Urethane: 11.9 hp	Material Steel	Sg Materials FC050-FC095 - Sintered Metal, FC099-FC225 - Machined Cast Iron	Sg Temperature Range -20 to 180 deg F Buna-N Spider, -80 to 180 deg F Urethane Spider

Product Questions & Answers (1)

Question by: Warren S on Oct 25, 2025, 4:04 PM

What's the horsepower limit on this thing, and does it matter which spider I run with it?

Answer by: Customer Support on Oct 27, 2025, 10:12 AM

Horsepower capacity does vary depending on the spider material. With a Buna-N spider, you're rated at 7.2 HP at 1800 RPM. Step up to a urethane spider and that rating jumps to 11.9 HP at the same speed. Those figures are based on driving hydraulic pumps with a service factor of 1.5, so if your application is something other than a pump drive, the usable rating may differ. Worth keeping in mind when you're spec'ing it out.