Hydraulic Gear Pumps | McMaster-Carr

Clear All

	For Use With For Use With

Hydraulic Fluid

Hydraulic Oil

	Maximum Flow Rate Maximum Flow Rate

	Maximum Pressure Maximum Pressure

	Voltage Voltage

	Fixed Displacement Rate Fixed Displacement Rate

	Shaft Diameter Shaft Diameter

	Pump Type Pump Type

Positive Displacement

Gear

Piston

Centrifugal

	Number of Mounting Holes Number of Mounting Holes

	Power Source Power Source

Electric

Add-a-Motor

Air

	Power Power

	Maximum Speed Maximum Speed

	Discharge Pipe Size Discharge Pipe Size

	Housing Material Housing Material

	Thread Size Thread Size

	Pump Style Pump Style

Constant Flow Rate

Circulating

	Overall Length Overall Length

	Overall Height Overall Height

	Maximum Temperature Maximum Temperature

175° to 199° F

200° F or greater

	Dash Size Dash Size

	Maximum Feet of Head Maximum Feet of Head

	Intake Pipe Size Intake Pipe Size

	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

Forward

How can we improve?

48 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

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

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

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

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

Self-Priming Circulation Pumps without Motor for Oil

Use these pumps to move lubricating oil such as hydraulic and motor oil. Also known as flexible impeller pumps, they create a suction force that can draw liquid upward to fill the pump chamber when your liquid source is below the pump. The impeller resists clogging and wear. Select a spark-free air motor for hazardous environments or attach an electric motor with a speed reducer or a belt pulley to alter the pump speed.

Repair kits (sold separately) include components such as impellers, O-rings, and seal lips.

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.

						Intake (NPT)		Discharge (NPT)		Shaft			Overall
Max. Flow Rate, gpm	Max. Ft. of Head, ft.	Max. Pressure, psi	Max. Viscosity	Temp. Range, °F	Required hp	Gender	Pipe Size	Gender	Pipe Size	Dia.	Lg.	Ctr.-to-Base Lg.	Ht.	Lg.	Wd.		Each
For 500 rpm-2,100 rpm Motor Speed
11.5	50	21	Not Rated	50° to 180°	1/3 hp	Female	1/2	Female	1/2	5/8"	1 1/8"	1 15/16"	3 13/16"	4 1/2"	4 1/8"	0000000	0000000
25	50	26	Not Rated	50° to 180°	3/4 hp	Female	1	Female	1	5/8"	2 1/4"	1 7/8"	3 9/16"	6 3/8"	4 3/4"	0000000	000000

Maintenance Kit for Pump with 25 gpm Max. Flow Rate	0000000	Each	0000000
Maintenance Kit for Pump with 11.5 gpm Max. Flow Rate	0000000	Each	00000

Air-Powered Constant-Flow-Rate Pumps

Commonly called piston pumps, these are often used in high-pressure applications, such as hydrostatic testing of pipelines, tanks, and valves. Flow and outlet liquid pressure can be controlled by varying the air pressure. To calculate discharge liquid pressure, multiply the air pressure by the ratio shown in the table. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber.

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.

Flow Rate, gpm					Air Pressure, psi						Overall
@ 0 psi	@ 3,000 psi	Max. ft. of Head	Max. Discharge Pressure, psi	Max. Viscosity, cP	Min.	Max.	Air Consumption, scfm	Air Connection (NPT)	Intake Pipe Connection (NPT)	Discharge Pipe Connection (NPT)	Lg.	Wd.	Ht.		Each
86:1 Discharge Liquid to Inlet Air Pressure Ratio
0.19	0.17	28,764	12,470	100	15	145	20	1/4 Female	3/8 Female	1/4 Female	4 5/8"	4"	9"	0000000	000000000
28:1 Discharge Liquid to Inlet Air Pressure Ratio
0.58	0.13	9,365	4,060	100	15	145	20	1/4 Female	3/8 Female	1/4 Female	4 5/8"	4"	9"	0000000	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

Hydraulic Power Units

Create and supply hydraulic pressure. Choose a unit with a tank capacity about three times greater than your requirement to allow for heat dissipation. An inlet filter protects the pump from contamination.

All units include an additional NPTF threaded inlet port. NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

				O'all			Inlet Connection— UN/UNF (SAE Straight)		Inlet Connection— NPTF		Outlet Connection— UN/UNF (SAE Straight)
Max. Flow Rate, gpm	Max. Pressure, psi	Power, hp	Cap., gal.	Lg.	Wd.	Ht.	Thread Size	Dash Size	Pipe Size	Dash Size	Thread Size	Dash Size	Full Load Current		Each
240V AC/460V AC, Three Phase
0.9	1,600	1	5	13"	15"	20 1/2"	7/8"-14	10	1/2	08	7/8"-14	10	1.5 A @ 460 V AC	00000000	000000000
1.3	2,300	2	5	13"	15"	24 1/2"	7/8"-14	10	1/2	08	7/8"-14	10	2.8 A @ 460 V AC	00000000	00000000
2.7	1,750	3	10	17 3/8"	19"	32 1/2"	1 1/16"-12	12	3/4	12	1 1/16"-12	12	4.4 A @ 460 V AC	00000000	00000000
3.6	2,050	5	10	17 3/4"	19"	29 3/4"	1 1/16"-12	12	3/4	12	1 1/16"-12	12	6.8 A @ 460 V AC	00000000	00000000
6.3	1,800	7 1/2	20	21 3/8"	22 1/2"	37 3/8"	1 1/16"-12	12	3/4	12	1 1/16"-12	12	9.5 A @ 460 V AC	00000000	00000000
8.6	1,700	10	30	21 3/8"	22 1/2"	42 1/4"	1 1/16"-12	12	3/4	12	1 1/16"-12	12	12 A @ 460 V AC	00000000	00000000
10.4	2,100	15	30	23 3/8"	22 1/2"	44 1/8"	1 1/16"-12	12	3/4	12	1 1/16"-12	12	18.1 A @ 460 V AC	00000000	00000000

Slim-Profile Hydraulic Power Units

Hydraulic Power Unit

Replacement Tank

Mount these units to an existing machine or where space is limited. They create and supply hydraulic pressure where standard models won’t fit. Choose a unit with a tank capacity about three times greater than your requirement to allow for heat dissipation.

Power Units
				O'all			Inlet Connection— NPT		Outlet Connection— NPT					Replacement Tanks
Max. Flow Rate, gpm	Max. Pressure, psi	Power, hp	Cap., gal.	Lg.	Wd.	Ht.	Pipe Size	Dash Size	Pipe Size	Dash Size	Full Load Current		Each		Each
120V AC/240V AC, Single Phase
1	2,500	2	2.3	36 1/8"	8 1/8"	8 5/8"	1/4	04	3/8	06	10 A @ 240 V AC	0000000	0000000	00000000	0000000
1.5	2,500	2	2.3	34 7/8"	8 1/8"	8 5/8"	1/4	04	3/8	06	10 A @ 240 V AC	0000000	000000	00000000	000000

Email Us

How to Prime Your Pump

How to Determine Feet of Head

About Process Pumps

Constant-Flow-Rate Pumps for Oil

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

Compact Constant-Flow-Rate Pumps for Water and Oil

Constant-Flow-Rate Pumps without Motor for Chemicals

Constant-Flow-Rate Pumps without Motor for Oil

Self-Priming Circulation Pumps without Motor for Oil

Air-Powered Constant-Flow-Rate Pumps

Hydraulic Pumps

Hydraulic Power Units

Slim-Profile Hydraulic Power Units