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Hi-Q Coupling Half, 1.13 Inch Bore, 1/4 Inch Key

Description & Features

Designed for efficient coupling in various applications, the MAUREY MANUFACTURING CO Hi-Q Coupling Half effectively prevents metal-to-metal contact and compensates for minor misalignments. Its robust construction from machined cast iron ensures durability and precision.

With a bore size of 1.125 inches and a key of 1/4 inch, this flexible coupling is typically used to link hydraulic pumps to electric motors, though it's versatile for other uses. The coupling's maximum angular offset capability is 1deg;, with a maximum parallel offset capability of 0.015 inches.

Fast installation is facilitated by the precision-ground and machined parts. Rust resistance further enhances its longevity. The Hi-Q Coupling Half offers a horsepower rating of 7.2 for Buna-N and 11.9 for Urethane.

The temperature range is suitable for a variety of conditions, with Buna-N spiders operating from -20deg;F to 180deg;F, and Urethane spiders from -80deg;F to 180deg;F. This coupling half is an essential component for effective mechanical connections in demanding environments.

Supplier Part Number: L100-1-1/8

Specifications

Bore 1.13	Brand Maurey Manufacturing Co	Brand Maurey Manufacturing Co	Pack Size 1.00	UOM EA	Horsepower Rating Buna-N: 7.2, Urethane: 11.9	Key 1/4	Supplier Part Number L100-1-1/8	Alternate Part Numbers Alternate Part Number C1EP74, Alternate Part Number MI-00507076, Alternate Part Number MINO-00544K23094	Product Weight 1.59 lbs

Similar Products

Model Number	Bore	Key	Horsepower Rating
FC095-1/2-W-1/8K Hi-Q Coupling Halv	0.5	1/8	Buna-N: 3.2, Urethane: 5.0
FC095-3/4 Hi-Q Coupling Halv	0.75	3/16	Buna-N: 3.2, Urethane: 5.0
FC100-1-1/8 Hi-Q Coupling Halv	1.125	1/4	Buna-N: 7.2, Urethane: 11.9
FC100-3/4 Hi-Q Coupling Halv	0.75	3/16	Buna-N: 7.2, Urethane: 11.9
FC095-1-1/8 Hi-Q Coupling Halv	1.125	1/4	Buna-N: 3.2, Urethane: 5.0
FC100-1-3/8 Hi-Q Coupling Halv	1.375	5/16	Buna-N: 7.2, Urethane: 11.9
FC100-1/2 Hi-Q Coupling Halv	0.5	--	Buna-N: 7.2, Urethane: 11.9
FC100-5/8 Hi-Q Coupling Halv	0.625	3/16	Buna-N: 7.2, Urethane: 11.9
FC100-7/8 Hi-Q Coupling Halv	0.875	3/16	Buna-N: 7.2, Urethane: 11.9
FC110-1-1/8 Hi-Q Coupling Halv	1.125	1/4	Buna-N: 13.1, Urethane: 28.8
FC110-3/4 Hi-Q Coupling Halv	0.75	3/16	Buna-N: 13.1, Urethane: 28.8
FC110-7/8 Hi-Q Coupling Halv	0.875	3/16	Buna-N: 13.1, Urethane: 28.8
FC095-1 Hi-Q Coupling Halv	1	1/4	Buna-N: 3.2, Urethane: 5.0
L100-1 Hi-Q Coupling Halv	1		Buna-N: 7.2, Urethane: 11.9

Product Questions & Answers (4)

Question by: Hugh T on Mar 2, 2026, 6:43 AM

got a 1-1/8 shaft with a 1/4 keyway, is this coupling half the right fit or am i off a size

Answer by: Customer Support on Mar 4, 2026, 6:54 AM

It matches a 1.125 inch bore and a 1/4 inch key, so it lines up with a 1-1/8 inch shaft that uses a 1/4 inch key.

Question by: Rhonda C on Nov 14, 2025, 8:50 PM

Will this here coupling work okay hooking up a hydraulic pump to a motor?

Answer by: Customer Support on Nov 16, 2025, 8:19 AM

Typically, these couplings are used to connect hydraulic pumps to electric motors. However, they can work in plenty of other applications where you need to join shafts. Just keep in mind the maximum angular offset of 1° and parallel offset of 0.015 inches.

Question by: Judy B on Oct 14, 2025, 4:22 PM

got a hydraulic pump bolting up to an electric motor and need a coupling half with a 1-1/8 inch bore and 1/4 inch keyway -- this the right one?

Answer by: Customer Support on Oct 16, 2025, 7:26 AM

that bore and key size match up exactly. The 1.13 inch bore with a 1/4 inch key is what this coupling half is built around, so it fits right into that pump-to-motor setup without any modification. Just make sure your shaft and keyway dimensions are machined to match, since these parts are precision ground and should seat clean when everything lines up.

Question by: Lynn R on Jun 25, 2025, 2:24 PM

Will this coupling hold up alright connecting a hydraulic pump to a motor, or is it meant for lighter duty stuff?

Answer by: Customer Support on Jun 26, 2025, 8:03 PM

These Hi-Q coupling halves are indeed typically used to link hydraulic pumps to electric motors. The horsepower rating is 7.2 for Buna-N and 11.9 for Urethane spiders when driving hydraulic pumps at 1800 RPM.