Circular Grippers | McMaster-Carr

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	Grip Style Grip Style	Show

Circular

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	Manufacturer Manufacturer

Schunk

SMC

	Manufacturer Model Number Manufacturer Model Number

	Manufacturer Series Manufacturer Series

DPZ+

JGZ

MHS3

	Gripping Location Gripping Location

External

Internal

	Overall Diameter Overall Diameter

	Diameter Diameter

	Component Component

	Gripper

	Jaw Return Mechanism Jaw Return Mechanism

Forced Air

	External Gripping Force External Gripping Force

	Maximum Pressure Maximum Pressure

85 psi

115 psi

	Application Application

For Lifting

	Maximum Gripping Capacity Maximum Gripping Capacity

	Weight Weight

	Maximum Holding Length Maximum Holding Length

	Internal Gripping Force Internal Gripping Force

	Seal Material Seal Material

Buna-N Rubber

Rubber

	Minimum Temperature Minimum Temperature

-10° F

45° F

	Maximum Temperature Maximum Temperature

Less than 200° F

	Housing Material Housing Material

Aluminum

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	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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41 Products

Air-Powered Grippers

(D) Gripper

Combine these grippers with your gripping fingers to lift and move items in pick-and-place applications.

Grippers with a forced-air jaw return have two air ports: one to move the jaws open and another to move them closed. The jaws grip items from the outside as well as the inside.

Circular grippers are best for a snug grip on round objects.

IP54-rated grippers are protected against dust and water splashed from all directions. They have an IP67 capable ventilation port that can be attached to a ventilation hose (connector and hose are not included), so they can become dust tight and be submerged in up to 1 meter of water for 30 minutes. All of these grippers are suitable for use in clean rooms rated to ISO Class 5.

Note: Choose a gripper with a holding force at least 10 times your item's weight.

Warning: Never use to lift people or items over people.

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

(D) Circular Grippers with Forced Air Jaw Return—Steel Jaws

(D) Gripper

			Dia., mm				O'all			Port
External Gripping Force	Internal Gripping Force	Max. Gripping Cap.	Max.	Min.	Max. Holding Lg., mm	Wt.	Lg., mm	Dia., mm	Max. Pressure, psi	Pipe Size	Thread Size	Thread Type	Manufacturer (Series/Model No.)		Each
Aluminum Housing
3.15 lbs. @ 72.5 psi	3.6 lbs. @ 72.5 psi	0.24 lbs./ 0.1 kg	14	10	29	0.14 lbs./ 0.06 kg	35	30	85	__	M3 × 0.5	Metric	SMC (MHS3 16)	0000000	0000000
5.62 lbs. @ 72.5 psi	6.29 lbs. @ 72.5 psi	0.43 lbs./ 0.19 kg	16	12	35	0.23 lbs./ 0.1 kg	38	36	85	__	M5 × 0.8	Metric	SMC (MHS3 20)	0000000	000000
9.44 lbs. @ 72.5 psi	10.57 lbs. @ 72.5 psi	0.72 lbs./ 0.32 kg	20	14	39	0.31 lbs./ 0.14 kg	40	42	85	__	M5 × 0.8	Metric	SMC (MHS3 25)	0000000	000000
57 lbs. @ 85 psi	60 lbs. @ 85 psi	2.75 lbs./ 1.25 kg	21	16	50	0.26 lbs./ 0.12 kg	27	56	115	__	M3 × 0.5	Metric	Schunk (JGZ 40)	0000000	000000
73 lbs. @ 85 psi	79 lbs. @ 85 psi	3.52 lbs./ 1.6 kg	28	20	64	0.55 lbs./ 0.25 kg	34	72	115	__	M5 × 0.8	Metric	Schunk (JGZ 50)	0000000	000000
130 lbs. @ 85 psi	140 lbs. @ 85 psi	6.39 lbs./ 2.9 kg	32	20	80	0.94 lbs./ 0.43 kg	43	87	115	__	M5 × 0.8	Metric	Schunk (JGZ 64)	0000000	000000
220 lbs. @ 85 psi	240 lbs. @ 85 psi	11.02 lbs./ 5 kg	42	26	100	1.74 lbs./ 0.79 kg	49	111	115	__	M5 × 0.8	Metric	Schunk (JGZ 80)	0000000	000000
400 lbs. @ 85 psi	430 lbs. @ 85 psi	19.84 lbs./ 9 kg	52	32	125	3.1 lbs./ 1.41 kg	59	135	115	1/8	__	BSPP	Schunk (JGZ 100)	0000000	000000
690 lbs. @ 85 psi	740 lbs. @ 85 psi	34.17 lbs./ 15.5 kg	66	40	160	6.1 lbs./ 2.8 kg	67	166	115	1/8	__	BSPP	Schunk (JGZ 125)	0000000	00000000
1,340 lbs. @ 85 psi	1,430 lbs. @ 85 psi	66.13 lbs./ 30 kg	82	50	200	12.3 lbs./ 5.6 kg	81	212	115	1/8	__	BSPP	Schunk (JGZ 160)	0000000	00000000
Aluminum Housing—IP54-Rated, ISO Class 5
51 lbs. @ 85 psi	56 lbs. @ 85 psi	2.53 lbs./ 1.15 kg	68	63	40	0.44 lbs./ 0.2 kg	34	68	115	__	M3 × 0.5	Metric	Schunk (DPZ+ 40)	0000000	00000000
65 lbs. @ 85 psi	71 lbs. @ 85 psi	3.19 lbs./ 1.45 kg	89	81	50	0.81 lbs./ 0.37 kg	40	89	115	__	M5 × 0.8	Metric	Schunk (DPZ+ 50)	0000000	00000000
115 lbs. @ 85 psi	135 lbs. @ 85 psi	5.73 lbs./ 2.6 kg	106	94	64	1.36 lbs./ 0.62 kg	49	106	115	__	M5 × 0.8	Metric	Schunk (DPZ+ 64)	0000000	00000000
200 lbs. @ 85 psi	220 lbs. @ 85 psi	9.92 lbs./ 4.5 kg	128	112	80	2.86 lbs./ 1.3 kg	56	128	115	__	M5 × 0.8	Metric	Schunk (DPZ+ 80)	0000000	00000000
360 lbs. @ 85 psi	430 lbs. @ 85 psi	17.85 lbs./ 8.1 kg	158	138	100	4.18 lbs./ 1.9 kg	67	158	115	1/8	__	BSPP	Schunk (DPZ+ 100)	0000000	00000000
660 lbs. @ 85 psi	670 lbs. @ 85 psi	32.4 lbs./ 14.7 kg	198	172	125	7.7 lbs./ 3.5 kg	76	198	115	1/8	__	BSPP	Schunk (DPZ+ 125)	0000000	00000000
1,280 lbs. @ 85 psi	1,320 lbs. @ 85 psi	62.83 lbs./ 28.5 kg	271	239	125	17.4 lbs./ 7.9 kg	93	271	115	1/8	__	BSPP	Schunk (DPZ+ 160)	0000000	00000000
1,510 lbs. @ 85 psi	1,600 lbs. @ 85 psi	73.85 lbs./ 33.5 kg	345	295	160	34.3 lbs./ 15.6 kg	111	345	115	1/8	__	BSPP	Schunk (DPZ+ 200)	0000000	00000000

Optional Sensors

Sensor

Add optional sensors to these grippers to signal when fingers are either open or closed (open and closed for sensors with two-position detection), and use that information to trigger other actions in your system. Magnetic sensors detect finger position by responding to magnets placed on the piston of air-powered grippers or the motor of electric-powered grippers. Sensors with a plug connection work with the input/output on robot tool mounts with a power/signal block. Sensors with a hardwire connection have wire leads you either wire to a plug or hardwire to a power source. PNP sensors communicate proximity with a positive signal, while NPN sensors send a negative signal.

Magnetic with Plug Connection
For Manufacturer (Series)	Signal Output Type	No. of Sensing Positions	Plug Type	No. of Wire Leads	Current, mA	Voltage	Switch Starting Position		Each
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	NPN	1	3-Pin M8	__	50	24V DC	1 Off (Normally Open)	00000000	0000000
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	PNP	1	3-Pin M8	__	50	24V DC	1 Off (Normally Open)	0000000	000000
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	PNP	2	4-Pin M8	__	100	24V DC	1 Off (Normally Open) and 1 On (Normally Closed)	00000000	000000
Magnetic with Hardwire Connection
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	NPN	1	__	3	50	24V DC	1 Off (Normally Open)	00000000	000000
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	PNP	1	__	3	50	24V DC	1 Off (Normally Open)	00000000	000000
Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	PNP	2	__	4	100	24V DC	1 Off (Normally Open) and 1 On (Normally Closed)	00000000	000000

Individual Gripper Finger Blanks

Individual

Finger blanks come ready to mount, so you can make custom fingers without starting from scratch. Just machine the blank’s gripping end to create fingers that will securely grip your specific parts.

When used in pairs, individual blanks have a symmetrical design that’s suitable for most applications.

Aluminum blanks are lightweight and resist rusting in wet environments. They’re softer than steel blanks, making them easier to machine and less likely to scratch your parts.

Steel blanks are stronger and more durable than aluminum blanks, so they’re less likely to break if they hit a nearby object. You can harden them for even more strength and durability.

	For Gripper Jaw		Overall
For Manufacturer (Series/Model No.)	Wd., mm	Dp., mm	Lg., mm	Wd., mm	Dp., mm	Mounting Hardware Included		Each
Aluminum
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 64)	21	12.5	64	32	22	Yes	00000000	000000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 80)	26	15	80	41	22	Yes	00000000	00000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 100)	33	18.5	100	52	30	Yes	00000000	000000
Steel
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 64)	21	12.5	64	32	22	Yes	00000000	00000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 80)	26	15	80	41	22	Yes	00000000	000000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 100)	33	18.5	100	52	30	Yes	00000000	000000

Adjustable Finger Mounts


	Adjustable Finger Mount
	Scale

Attach adjustable finger mounts to your Schunk grippers, so they can handle a wider range of part sizes and shapes. Each mount has a positioning slide that moves along a rail, which has a scale for making adjustments. Connect your fingers to the slides, position them on the rail, and tighten the knob to secure them in place. Use one mount for as many fingers as your gripper will hold.

							Gripper		Finger
For Manufacturer (Series/Model No.)	Manufacturer (Series/Model No.)	Rail Lg., mm	Travel Lg., mm	Carriage Wd., mm	O'all Ht., mm	Adjustment Increments (Lg.), mm	Bolt Hole Thread Size	No. of Bolt Holes	Bolt Hole Thread Size	No. of Bolt Holes	Mounting Fasteners Included		Each
Anodized Aluminum
With Nonremovable Positioning Slides
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 64)	Schunk (UZB 64)	63.5	33	36	36	2	M4 × 0.7 mm	2	M4 × 0.7 mm	2	No	00000000	0000000
With Removable Positioning Slides
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 125)	Schunk (UZB 125)	112.75	72	52	49	3	M6 × 1 mm	2	M6 × 1 mm	2	No	00000000	000000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 80)	Schunk (UZB 80)	79	44	42	39.5	2	M5 × 0.8 mm	2	M5 × 0.8 mm	2	No	00000000	000000
Schunk (JGP, JGP-P, JGZ, PGN+, PGN+E, PGN+P, PZN+ 100)	Schunk (UZB 100)	96.5	55	47	45.5	3	M6 × 1 mm	2	M6 × 1 mm	2	No	00000000	000000

Removable Positioning Slides

Removable Positioning Slide

Removable positioning slides are part of the adjustable finger mounts. Add additional slides for tasks that require frequent finger changes. Having slides on hand with fingers already attached, makes it quick and easy to retool your gripper.

Anodized Aluminum
For Manufacturer (Series/Model No.)	Bolt Hole Thread Size	Number of Bolt Holes	Mounting Fasteners Included		Each
Schunk (UZB 80)	M5 × 0.8 mm	2	No	00000000	0000000
Schunk (UZB 100)	M6 × 1 mm	2	No	00000000	000000
Schunk (UZB 125)	M6 × 1 mm	2	No	00000000	000000

Robot-Ready Configurable Grippers

Build a complete robot gripping tool using these grippers, fingers, and robot tool mounts. They’re quick to assemble, so you can test and iterate rapidly to improve their productivity and reliability. Reconfiguring them for a new job won’t take long either.

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

Grippers

Air-Powered Circular Gripper

Make fingers open and close with equal force in order to grasp and release parts from the inside or out. Grippers with a higher stroke width support a wider grip. Connect them to robot tool mounts using gripper configuration kits.

Air-powered grippers run on compressed air. Circular grippers hold small cylindrical parts more snugly and centered than parallel grippers. However, they can’t hold cube-shaped parts.

							O'all, mm
External / Internal Gripping Force	Max. Gripping Cap.	Grip Opening / Closing Time	Cycles per Second	Stroke Wd., mm	Max. Finger Spacing, mm	Wt.	Dia.	Housing Material	Manufacturer (Series)		Each
Air-Powered
Circular with Forced Air Jaw Return—Steel Jaws
130 lbs. @ 87 psi / 140 lbs. @ 87 psi	6.3 lbs. / 2.9 kg	30 ms / 30 ms	13	12	56	1.40 lbs. / 0.60 kg	97	Anodized Aluminum	Schunk (JGZ)	00000000	000000000
220 lbs. @ 87 psi / 240 lbs. @ 87 psi	11 lbs. / 5 kg	50 ms / 50 ms	8	16	70	2.50 lbs. / 1.10 kg	124	Anodized Aluminum	Schunk (JGZ)	0000000	00000000
400 lbs. @ 87 psi / 430 lbs. @ 87 psi	19.8 lbs. / 9 kg	100 ms / 100 ms	4	20	90	4.20 lbs. / 1.90 kg	157	Anodized Aluminum	Schunk (JGZ)	00000000	00000000

Optional Sensors

Sensor

Sensor Cord Splitter

Signal when fingers are either open or closed, and use that information to trigger other actions in your system.

Magnetic sensors detect finger position by responding to magnets placed on the piston of air-powered grippers or the motor of electric-powered grippers. Sensors with programmable two-position detection send a signal when fingers open and close, letting you trigger actions in your system based on both signals.

Sensors with a plug connection work with the input/output on robot tool mounts with a power/signal block. Sensors with a hardwire connection have wire leads you either wire to a plug or hardwire to a power source.

PNP sensors communicate proximity with a positive signal, while NPN send a negative signal.

Sensors										Sensor Cord Splitters
Signal Output Type	No. of Sensing Positions	Plug Type	No. of Wire Leads	Current, mA	Voltage	Switch Starting Position	For Manufacturer (Series)		Each		Each
Magnetic with Plug Connection
NPN	1	3-Pin M8	__	50	24V DC	1 Off (Normally Open)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	00000000	0000000	000000	00
PNP	1	3-Pin M8	__	50	24V DC	1 Off (Normally Open)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	0000000	000000	000000	00
PNP	2	4-Pin M8	__	100	24V DC	1 Off (Normally Open) and 1 On (Normally Closed)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	00000000	000000	0000000	000000
Magnetic with Hardwire Connection
NPN	1	__	3	50	24V DC	1 Off (Normally Open)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	00000000	000000	000000	00
PNP	1	__	3	50	24V DC	1 Off (Normally Open)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	00000000	000000	000000	00
PNP	2	__	4	100	24V DC	1 Off (Normally Open) and 1 On (Normally Closed)	Schunk (DPG+, DPZ+, DRG, JGP, JGP-P, JGZ, KGG, MPG+, PGN+E)	00000000	000000	000000	00