Rotary Gear Pumps | McMaster-Carr

	Maximum Flow Rate Maximum Flow Rate

	For Use With For Use With

	Maximum Pressure Maximum Pressure

	Pump Type Pump Type

Gear

Positive Displacement

	Discharge Pipe Size Discharge Pipe Size

	Power Source Power Source

Electric

Add-a-Motor

	Voltage Voltage

	Intake Pipe Size Intake Pipe Size

	Power Power

	Shaft Diameter Shaft Diameter

	Maximum Temperature Maximum Temperature

	Maximum Feet of Head Maximum Feet of Head

	Number of Mounting Holes Number of Mounting Holes

	Housing Material Housing Material

	Overall Length Overall Length

	Fixed Displacement Rate Fixed Displacement Rate

	Discharge Connection Type Discharge Connection Type

Pipe

Tube

	Maximum Viscosity Maximum Viscosity

	Phase Phase

Three

Single

	Priming Type Priming Type

Initial Fill

Gravity Fed

Self-Priming

	Intake Connection Type Intake Connection Type

Pipe

Tube

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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43 Products

How to Prime Your Pump

How to Determine Feet of Head

About Process Pumps

A high-horsepower motor moves oil with a viscosity similar to SAE 60 motor oil. Also known as gear pumps, these produce a smooth flow of liquid to lubricate equipment and blend oils. Motor is open dripproof (ODP) for use in clean, dry, and well-ventilated environments. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.

Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.

					Intake			Discharge			Overall
Max. Flow Rate, gpm	Max. Viscosity, cP	Temp. Range, °F	hp	Current, A	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.		Each
240/460V AC, Three Phase—Without Thermal Overload Protection
Hardwire
5	880	-20° to 240°	1/2	2/1	1/2	NPT	Female	1/2	NPT	Female	21 5/8"	6 7/8"	8 1/2"	00000000	000000000
208-240/460V AC, Three Phase—Without Thermal Overload Protection
Hardwire
10	880	-20° to 240°	2	6.2/3.1	3/4	NPT	Female	3/4	NPT	Female	24"	6 7/8"	8 1/2"	00000000	00000000
20	880	-20° to 240°	2	6.2/3.1	1	NPT	Female	1	NPT	Female	24 1/2"	6 7/8"	8 1/2"	00000000	00000000
30	880	-20° to 240°	3	8.2/4.1	1	NPT	Female	1	NPT	Female	25"	6 7/8"	8 1/2"	00000000	00000000
40	880	-20° to 240°	5	13.8/6.9	1 1/2	NPT	Female	1 1/2	NPT	Female	28 1/8"	11 7/8"	8 1/2"	00000000	00000000

Constant-Flow-Rate Pumps for Water

Also known as gear pumps, these produce a smooth flow of liquid for applications such as cooling engines, powering hydraulic equipment, and extracting liquid from holding tanks. Pumps are self-priming after you fill the pump chamber with liquid. As liquid in the chamber is expelled, a suction force is created which allows the pump to draw liquid upward. Do not use with solids.

Pumps with an open dripproof (ODP) motor are for use in clean, dry, and well-ventilated environments. They have a relief valve to prevent pressure buildup.

Pumps with a totally enclosed (TE) or totally enclosed fan-cooled (TEFC) motor can be used in dusty, dirty, and damp environments.

Pumps that cannot be sold to Canada are restricted by local energy efficiency requirements.

Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry. If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.

For technical drawings and 3-D models, click on a part number.

						Intake (NPT)		Discharge (NPT)			Overall
Max. Flow Rate, gpm	Discharge Pressure, psi	Max. Viscosity, cP	Temp. Range, °F	hp	Current, A	Pipe Size	Gender	Pipe Size	Gender	Motor Enclosure Type	Lg.	Wd.	Ht.	Cannot Be Sold To		Each
115/230V AC, Single Phase—Without Thermal Overload Protection
Hardwire
2.1	150	100,000	32° to 140°	1/2	7.4/3.7	1/4	Female	1/4	Female	Totally Enclosed	16 1/16"	8 3/16"	8"	__	0000000	000000000
8.5	150	100,000	32° to 140°	1	12.8/6.4	1/2	Female	1/2	Female	Totally Enclosed	18 1/8"	9 3/16"	9"	__	0000000	00000000
120/240V AC, Single Phase—With Thermal Overload Protection
Hardwire
3.9	100	88	-20° to 210°	1/2	6.8/3.4	3/8	Female	3/8	Female	Open Dripproof	15 11/16"	5 5/8"	5 3/4"	Canada	000000	000000
230/460V AC, Three Phase—Without Thermal Overload Protection
Hardwire
10.2	150	100,000	32° to 140°	1 1/2	4.4/2.2	1/2	Female	1/2	Female	Totally Enclosed Fan Cooled	19 13/16"	9 5/16"	7 1/4"	Canada	0000000	00000000
23	150	100,000	32° to 140°	3	8.4/4.2	1	Female	1	Female	Totally Enclosed Fan Cooled	25 1/8"	10 5/16"	9 1/16"	Canada	0000000	00000000

Compact Constant-Flow-Rate Pumps for Water and Oil

Designed to fit into small equipment, these pumps have miniature gears and a subfractional horsepower motor for low-flow applications. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.

Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.

For technical drawings and 3-D models, click on a part number.

						Intake			Discharge			Overall
Max. Flow Rate	Max. Pressure, psi	Max. Viscosity, cP	Temp. Range, °F	hp	Current, A	Tube Connection Type	Gender	For Tube ID	Tube Connection Type	Gender	For Tube ID	Lg.	Wd.	Ht.		Each
120V AC, Single Phase—With Thermal Overload Protection
Hardwire
0.43 gpm (55 oz./min.)	20	800	10° to 180°	Subfractional	1.5	Barbed	Male	3/16"	Barbed	Male	3/16"	4 3/8"	3"	3 3/4"	0000000	0000000
240V AC, Single Phase—With Thermal Overload Protection
Hardwire
0.43 gpm (55 oz./min.)	20	800	10° to 180°	Subfractional	1.5	Barbed	Male	3/16"	Barbed	Male	3/16"	4 3/8"	3"	3 3/4"	0000000	000000

Harsh-Environment Compact Constant-Flow-Rate Pumps for Water and Oil

An aluminum enclosure around the motor provides protection in dusty and dirty environments. Designed to fit into small equipment, these pumps have miniature gears and a subfractional horsepower motor for low-flow applications. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.

Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.

For technical drawings and 3-D models, click on a part number.

						Intake			Discharge			Overall
Max. Flow Rate	Max. Pressure, psi	Max. Viscosity, cP	Temp. Range, °F	hp	Current, A	Tube Connection Type	Gender	For Tube ID	Tube Connection Type	Gender	For Tube ID	Lg.	Wd.	Ht.		Each
12V DC—Without Thermal Overload Protection
Hardwire
0.61 gpm (78 oz./min.)	20	800	10° to 180°	Subfractional	2.2	Barbed	Male	3/16"	Barbed	Male	3/16"	4"	1 3/4"	2 1/2"	0000000	000000
24V DC—Without Thermal Overload Protection
Hardwire
0.61 gpm (78 oz./min.)	20	800	10° to 180°	Subfractional	1.4	Barbed	Male	3/16"	Barbed	Male	3/16"	4"	1 3/4"	2 1/2"	0000000	00000

Constant-Flow-Rate Pumps without Motor for Water

These pumps have a bronze housing and gears for use with water. Select your own motor to tailor them to your application. Use a NEMA 56C frame electric motor with a coupling and belt/pulley drive. Also known as gear pumps, they produce a smooth flow of liquid for water delivery. All are self-priming, which means they create a suction force to draw liquid upward and fill the pump chamber. Do not use with solids.

Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.

For technical drawings and 3-D models, click on a part number.

				Required hp		Intake			Discharge			Overall			Shaft
Max. Flow Rate, gpm	Max. Flow Rate @ 25 psi, gpm	Max. Ft. of Head, ft.	Max. Viscosity, cP	@ 25 psi	@ 100 psi	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr.-to-Base Lg.		Each
For 1,725 rpm Max. Motor Speed
2.1	1.8	345	17,300	1/8	1/4	1/4	NPT	Female	1/4	NPT	Female	6 3/16"	2 1/2"	3"	1/2"	1 13/16"	1 7/8"	000000	0000000
4.2	4	345	17,300	1/4	1/2	1/4	NPT	Female	1/4	NPT	Female	5 3/4"	3"	3 11/16"	1/2"	1 13/16"	2 3/8"	0000000	000000
10.6	10.2	345	17,300	3/4	1 3/4	1/2	NPT	Female	1/2	NPT	Female	6 7/8"	3 3/4"	4 1/4"	5/8"	2"	2 3/4"	0000000	000000
19.8	19	345	17,300	1 1/2	2 3/4	3/4	NPT	Female	3/4	NPT	Female	7 1/16"	4 3/8"	5 1/4"	5/8"	2 3/16"	3 9/16"	0000000	000000
23.5	22.2	345	17,300	1 1/2	2 3/4	1	NPT	Female	1	NPT	Female	7 5/16"	4 5/16"	5 1/4"	5/8"	2 3/16"	3 9/16"	0000000	000000
For 1,750 rpm Max. Motor Speed
7.2	7	345	17,300	3/4	1 1/2	3/8	NPT	Female	3/8	NPT	Female	6 9/16"	3 3/4"	4 1/4"	5/8"	2 1/16"	2 3/4"	0000000	000000

Constant-Flow-Rate Pumps without Motor for Oil

A cast iron housing and steel gears allow these pumps to be used to dispense oil and fuel such as hydraulic oil and diesel fuel. Select your own motor to tailor them to your application. Use an air or electric motor with a coupling and belt/pulley drive. Also known as gear pumps, they produce a smooth flow of liquid for applications such as engine lubrication. All are self-priming, which means they create a suction force to draw liquid upward and fill the pump chamber. Do not use with solids.

Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.

For technical drawings and 3-D models, click on a part number.

				Required hp		Intake			Discharge			Overall			Shaft
Max. Flow Rate @ 25 psi, gpm	Max. Flow Rate, gpm	Max. ft. of Head	Max. Viscosity, cP	@ 25 psi	@ 100 psi	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.	Dia.	Lg.	Center-to-Base Lg.		Each
8.9	9	462	20,000	3/4	1	1/2	NPT	Female	1/2	NPT	Female	7 1/4"	3 7/16"	4 1/2"	11/16"	1 9/16"	3"	00000000	0000000
23	23.2	462	600	1.2	2.1	1	NPT	Female	3/4	NPT	Female	9 1/8"	4 1/2"	6"	3/4"	1 1/2"	3 7/8"	00000000	00000000

Constant-Flow-Rate Pumps without Motor for Chemicals

With a 316 stainless steel housing and stainless steel gears, these pumps are often used to dispense chemicals such as ethylene glycol, isopropyl alcohol, and nitric acid. Use an electric motor with a coupling and belt/pulley drive. Also known as gear pumps, they produce a smooth flow of liquid. All are self-priming, which means they create a suction force to draw liquid upward and fill the pump chamber. Do not use with solids.

For technical drawings and 3-D models, click on a part number.

					Required hp		Intake (NPT)		Discharge (NPT)		Overall			Shaft
Max. Flow Rate @ 25 psi, gpm	Max. Flow Rate, gpm	Max. ft. of Head	Max. Pressure, psi	Max. Viscosity, cP	@ 25 psi	@ 100 psi	Pipe Size	Gender	Pipe Size	Gender	Lg.	Wd.	Ht.	Dia.	Lg.	Center-to-Base Lg.		Each
4.5	4.5	462	200	20,000	1/4	1/2	3/8	Female	3/8	Female	6 1/4"	3"	3 11/16"	9/16"	1 11/16"	2 3/8"	00000000	000000000
8.9	9	462	200	20,000	3/4	1	1/2	Female	1/2	Female	7 1/4"	3 1/2"	4 1/2"	11/16"	1 9/16"	3"	00000000	00000000

Hydraulic Pumps

Also known as gear pumps, these have few moving parts so they're less prone to wear than other hydraulic pumps. Combine with an electric motor to generate flow in a hydraulic system. To mount to a NEMA C-face motor, use a Pump-to-Motor Mount (sold separately).

UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

For technical drawings and 3-D models, click on a part number.

SAE AA—3 1/4" Mounting Hole Center-to-Center

SAE AA

SAE AA, A, and B

				Inlet Connection— UN/UNF (SAE Straight)		Outlet Connection— UN/UNF (SAE Straight)		Overall		Shaft
Fixed Displacement Rate, cu. in./rev.	Max. Flow Rate, gpm	Max. Pressure, psi	Max. Speed, rpm	Thread Size	Dash Size	Thread Size	Dash Size	Ht.	Lg.	Dia.	Lg.	Choose a Drive Direction		Each
0.11	1.7	2,500	4,000	7/8"-14	10	3/4"-16	08	3 5/8"	4"	1/2"	1 1/4"	Clockwise, Counterclockwise	0000000	0000000
0.21	3.3	2,500	4,000	7/8"-14	10	3/4"-16	08	3 5/8"	4 1/4"	1/2"	1 1/4"	Clockwise, Counterclockwise	0000000	000000
0.33	5.2	2,500	4,000	7/8"-14	10	3/4"-16	08	3 5/8"	4 3/8"	1/2"	1 1/4"	Clockwise, Counterclockwise	0000000	000000
0.52	8.4	2,500	4,000	7/8"-14	10	3/4"-16	08	3 5/8"	4 3/4"	1/2"	1 1/4"	Clockwise, Counterclockwise	0000000	000000
0.64	7.8	2,000	3,000	7/8"-14	10	3/4"-16	08	3 5/8"	4 7/8"	1/2"	1 1/4"	Clockwise, Counterclockwise	0000000	000000

SAE A—4 3/16" Mounting Hole Center-to-Center

SAE A

SAE AA, A, and B

				Inlet Connection— UN/UNF (SAE Straight)		Outlet Connection— UN/UNF (SAE Straight)		Overall		Shaft
Fixed Displacement Rate, cu. in./rev.	Max. Flow Rate, gpm	Max. Pressure, psi	Max. Speed, rpm	Thread Size	Dash Size	Thread Size	Dash Size	Ht.	Lg.	Dia.	Lg.	Choose a Drive Direction		Each
0.37	5.9	4,000	4,000	7/8"-14	10	3/4"-16	08	4 5/8"	4 7/8"	3/4"	1"	Clockwise,Counterclockwise	0000000	0000000
0.49	7.9	4,000	4,000	1 1/16"-12	12	7/8"-14	10	4 5/8"	5"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000
0.61	9.9	4,000	4,000	1 1/16"-12	12	7/8"-14	10	4 5/8"	5 1/8"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000
0.98	11.9	4,000	3,000	1 1/16"-12	12	7/8"-14	10	4 5/8"	5 1/2"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000
1.16	14.1	4,000	3,000	1 5/16"-12	16	1 1/16"-12	12	4 5/8"	5 5/8"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000
1.4	15.9	3,200	2,800	1 5/16"-12	16	1 1/16"-12	12	4 5/8"	5 7/8"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000
1.65	16.1	2,700	2,400	1 5/16"-12	16	1 1/16"-12	12	4 5/8"	6 1/8"	3/4"	1"	Clockwise,Counterclockwise	0000000	000000

SAE B—5 3/4" Mounting Hole Center-to-Center

SAE B

SAE AA, A, and B

				Inlet Connection— UN/UNF (SAE Straight)		Outlet Connection— UN/UNF (SAE Straight)		Overall		Shaft
Fixed Displacement Rate, cu. in./rev.	Max. Flow Rate, gpm	Max. Pressure, psi	Max. Speed, rpm	Thread Size	Dash Size	Thread Size	Dash Size	Ht.	Lg.	Dia.	Lg.	Choose a Drive Direction		Each
2.01	24.5	4,000	3,000	1 5/8"-12	20	1 5/16"-12	16	5 7/8"	7 1/8"	7/8"	1 1/4"	Clockwise,Counterclockwise	0000000	0000000
2.32	28.3	4,000	3,000	1 5/8"-12	20	1 5/16"-12	16	5 7/8"	7 3/8"	7/8"	1 1/4"	Clockwise	0000000	000000
3.05	33.5	2,900	2,700	1 5/8"-12	20	1 5/16"-12	16	5 7/8"	7 3/4"	7/8"	1 1/4"	Clockwise,Counterclockwise	0000000	000000

SAE 4F17—2" Mounting Hole Center-to-Center

SAE 4F17

SAE 4F17

				Inlet Connection— UN/UNF (SAE Straight)		Outlet Connection— UN/UNF (SAE Straight)		Overall		Shaft
Fixed Displacement Rate, cu. in./rev.	Max. Flow Rate, gpm	Max. Pressure, psi	Max. Speed, rpm	Thread Size	Dash Size	Thread Size	Dash Size	Ht.	Lg.	Dia.	Lg.	Drive Direction		Each
0.07	0.8	3,000	4,000	9/16"-18	06	9/16"-18	06	3 7/16"	4 5/8"	1/2"	1 3/8"	Clockwise and Counterclockwise	0000000	0000000
0.13	1.7	3,000	4,000	3/4"-16	08	3/4"-16	08	3 7/16"	4 5/8"	1/2"	1 3/8"	Clockwise and Counterclockwise	0000000	000000
0.39	5	3,000	4,000	7/8"-14	10	7/8"-14	10	3 7/16"	5 1/8"	1/2"	1 3/8"	Clockwise and Counterclockwise	0000000	000000
0.71	5.4	1,800	2,400	7/8"-14	10	7/8"-14	10	3 7/16"	5 5/8"	1/2"	1 3/8"	Clockwise and Counterclockwise	0000000	000000

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How to Prime Your Pump

How to Determine Feet of Head

About Process Pumps

Constant-Flow-Rate Pumps for Oil

Constant-Flow-Rate Pumps for Water

Compact Constant-Flow-Rate Pumps for Water and Oil

Harsh-Environment Compact Constant-Flow-Rate Pumps for Water and Oil

Constant-Flow-Rate Pumps without Motor for Water

Constant-Flow-Rate Pumps without Motor for Oil

Constant-Flow-Rate Pumps without Motor for Chemicals

Hydraulic Pumps