GRS series
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GRS LOW PROFILE WITH MINIMAL JAW PLAY large hardened jaw driving surfaces provide high grip forces and minimal wear plated & hardened steel jaw cover provides long life integral jaw seals provide additional contamination protection and retain lubrication ground & hardened steel jaws have precision dowel holes for accurate mounting of jaw tooling and minimal jaw play cam driver is keyed for centering repeatability solid state and proximity switches available for sensing jaw position (with -CU option) jaws available in 2 travel lengths for increased versatility hardcoated aluminum body with precision machined jaw guides delivers rugged, wear resistant jaw support hard chrome piston rod for extended seal life large bore size provides high grip force in a very compact package manifolds and additional mountings are available for greater flexibility in applications precision machined dowel holes on the body mounting surfaces provide accurate gripper mounting self-lubricating cam driver provides long life without maintenance spring assist available for higher grip force or part retention upon loss of air pressure piston & rod seals formulated for long life Major Benefits Industry Uses Large hardened jaw driving surfaces Low profile Two jaw travels per size Manifold porting options Four bore sizes with five gripper sizes available in both imperial and metric versions Optional mounting and port positions available Spring assist on open or close available 1-2 day shipping Six million cycles minimum rated life (includes spring assist units) Assembly machine builders Robotics Cosmetics Plumbing fixtures Vehicle lighting equipment

ORDERING DATA: SERIES GRS GRIPPERS OPTIONS (OMIT IF NOT REQUIRED) PORTING OPTIONS L11-UB99 - Manifold option in location 99 L11-UB37 - Manifold option in location 37 (includes GR3 option) UB48 - Port option in location 48 SWITCH OPTION CU - Switch Ready MOUNTING OPTION GR3 - Mounting option in location 37 SPRING ASSIST FSR2 - Spring assist close FSE2 - Spring assist open TO ORDER SPECIFY: Product Line, Series, Type, Grip, Jaw, Design No., Size, Total Jaw Travel, and Options required. SERIES Regular Duty DESIGN NO. (See Note) 1 - Imperial 5 - Metric GRIP High Force G R S 3 3 - 1 - 27 x 4.5 -...

ENGINEERING DATA: SERIES GRS GRIPPERS SPECIFICATIONS SERIES GRS OPERATING PRESSURE STANDARD UNIT 30 psi min to 100 psi max [2 bar min to 7 bar max] air SPRING ASSIST UNIT 50 psi min to 100 psi max [3.5 bar min to 7 bar max] air OPERATING TEMPERATURE -20¡F to +180¡F [-28¡C to +82¡C] RATED LIFE 6 million cycles minimum (including spring assist units) GRIP REPEATABILITY Within ±0.001 in [±0.025 mm] of original position CYCLE TIME See table below LUBRICATION Factory lubricated for rated life MAINTENANCE Field repairable *Spring grip force (SF) varies with spring compression. The minimum spring...

ENGINEERING DATA: SERIES GRS GRIPPERS TOOLING LENGTH FACTOR Jaw tooling should be designed so that the grip point is as close to the cover surface as possible. As the grip point is moved away from the cover surface, the applied moment causes jaw friction to increase, resulting in reduced effective grip force. The Grip Force Factor (GF) values given in the table on page 4-25 are for zero tooling length (cover surface). GRIP force CALCULATION Equations: IMPERIAL: TOTAL GRIP FORCE [lb] = (Pressure [psi] x GF ) x Tooling Length Factor TOTAL GRIP FORCE WITH SPRINGS [lb] = ((Pressure [psi] x GF )...

DIMENSIONS: SERIES GRS GRIPPERS 3 2X MANUFACTURING HOLES (CONSULT PHD FOR MORE INFORMATION) 2X K1 THD (SIZE 27, 28, 32 & 50) 4X K1 THD (SIZE 63 ONLY) EXTRA SIZE 63 THREADS SHOWN SHADED NOTES: 1) **DIMENSIONS FOR THESE FEATURES CHANGE FOR SPRING ASSIST UNITS, SEE SPRING ASSIST DIMENSIONS ON OPTION PAGES FOR INFORMATION. 2) DESIGNATED C IS CENTERLINE OF UNIT L 3) METRIC INFORMATION SHOWN IN [ ] OR SHOWN IN COLUMNS DESIGNATED mm 4) CIRCLED NUMBERS INDICATE POSITIONS 5) *A OPEN REFLECTS THE SMALLEST POSSIBLE OPEN DIMENSION A CLOSED REFLECTS THE LARGEST POSSIBLE CLOSED DIMENSION 6) CIRCLED...

OPTIONS: SERIES GRS GRIPPERS FSR2 FSE2 MEDIUM FORCE SPRING ASSIST CLOSE MEDIUM FORCE SPRING ASSIST OPEN Springs can maintain spring grip force if air pressure is lost or increase grip force in one specific direction when used with air pressure. Spring assist units are engineered and tested for a minimum of 6 million cycles under normal operating conditions. Working air pressure for spring assist units is 50 psi min - 100 psi max [3.5 bar min - 7 bar max]. For spring grip forces, see table on page 4-25. B5 (SPRING ASSIST ADDER) NOTES: 1) DESIGNATED C IS CENTERLINE OF UNIT L OPTIONAL SPRING...

OPTIONS: SERIES GRS GRIPPERS L11-UB99 MANIFOLD PORTS With these options the gripper is configured for manifold mounting on either the standard or optional mounting face, according to the selected option code. The standard ports are plugged. O-ring seals are provided for mounting between the gripper and the manifold. When the L11-UB37 option is specified, the GR3 option is automatically included to provide mountings on the manifold surface. See page 4-30 for GR3 mounting information. MANIFOLD OPTION L11-UB37 INCLUDES MOUNTING OPTION GR3 (SEE GR3 OPTION FOR DIMENSIONS) JAWS SHOWN IN CLOSED...

OPTIONS: SERIES GRS GRIPPERS GR3 MOUNTING OPTION IN LOCATION 37 This option provides mounting threads and dowel holes on the side opposite the standard ports. K11 K7 C L K10 K8 GR3 MOUNTING, INCLUDES 2 FEMALE THREADS AND 2 DOWEL PIN HOLES OPTIONAL SPRING ASSIST NOTES: 1) DESIGNATED C IS CENTERLINE OF UNIT L 2) METRIC INFORMATION SHOWN IN [ ] OR IN COLUMNS DESIGNATED mm 3) CIRCLED NUMBERS INDICATE POSITIONS 4) *APPLIES TO SPRING ASSIST UNITS ONLY SWITCH READY With this option the gripper includes a target pin attached to the jaw for use with inductive proximity switches as well as the Series...

ACCESSORIES: SERIES GRS GRIPPERS PROXIMITY SWITCHES (-CU OPTION REQUIRED) See Switches and Sensors section for complete switch specifications. 4 mm ROUND INDUCTIVE PROXIMITY SWITCHES (SIZE 27, 28, & 32) PART NUMBER DESCRIPTION 18430-001-02 NPN (Sink) 2 meter cable 18430-002-02 PNP (Source) 2 meter cable Each kit includes 1 target, 2 switch mounting brackets, and fasteners for mounting. Switches sold separately. 8 mm THREADED INDUCTIVE PROXIMITY SWITCHES (SIZE 50 & 63) PART NUMBER DESCRIPTION 51422-005-02 NPN (Sink) 2 meter cable 51422-006-02 PNP (Source) 2 meter cable JAWS SHOWN IN CLOSED...