Shock Absorber: Short Type Series RBQ Component Parts No. 1 2 3 4 5 6 Description Outer tube Piston rod Piston Bearing Return spring Stopper Rolled steel Special steel Special steel Special bearing material Piano wire Carbon steel Black electroless nickel plated Heat treated, Hard chrome plated Heat treated Zinc chromated Zinc chromated Material Treatment No. 7 8 9 10 11 Description Check ball Accumulator Rod seal Scraper Bumper Bearing steel Fluororubber NBR NBR Polyurethane Foam rubber Only with bumper Material Treatment At impact At returning Allowable eccentric angle is 5° Ideal for absorption of rotating energy Allowable eccentic angle θ1 .. 5° Load With bumper Series RBQC Basic type Series RBQ Construction When the impact object is removed, the return spring pushes out the piston rod, and negative pressure, generated at the same time, opens the check ball to permit oil to return to the inside of the piston rod and the piston, making the shock absorber ready for the next impact. An impact object that strikes against the piston rod end pressurizes oil inside the piston. Thus, pressurized oil jets out through the orifice inside the piston, thereby generating hydraulic resistance to absorb the energy of the impacting object. The oil jetted out through the orifice is collected inside the outer tube by means of the stretching action of the accumulator. Q RBQC C C 20 07 16 Replacement part no./Bumper Nil C Basic type With bumper . 2 mounting hexagon nuts are attached as standard. Basic type With bumper Extended Retracted RBQ1604 RBQC1604 1.96 M16 x 1.5 4 60 294 6.08 13.45 28 RBQ16S RBQ2007 RBQC2007 11.8 M20 x 1.5 7 60 490 12.75 27.75 60 RB20S RBQ2508 RBQC2508 19.6 M25 x 1.5 8 45 686 15.69 37.85 110 RBQ25S RBQ3009 RBQC3009 33.3 M30 x 1.5 8.5 45 981 21.57 44.23 182 RBQ30S RBQ3213 RBQC3213 49.0 M32 x 1.5 13 30 1177 24.52 54.23 240 RBQ32S 0.05 to 3 .10 to 80 Model Spring force (N) Max. energy absorption (J) Note) Thread O.D. size Stroke absorption (mm) Collision speed (m/s) Max. operating frequency (cycle/min) Max. allowable thrust (N) Ambient temperature (C°) Weight (g) Option/Stopper nut Specifications How to Order RB Symbol Nil J N S SJ SN Hex. nut 2 pcs. 3 pcs. . 2 pcs. 3 pcs. . Stopper nut . . . 1 pc. 1 pc. 1 pc. 16 20 25 RBQC1604 RBQC2007 RBQC2508 30 32 RBQC3009 RBQC3213 Bumper cannot be mounted for basic type. Please place an order with bumper type from the beginning. 1604 2007 2508 O.D. thread size 16 mm 20 mm 25 mm Stroke 4 mm 7 mm 8 mm 3009 3212 O.D. thread size 30 mm 32 mm Stroke 9 mm 13 mm Symbol Symbol Note) The maximum energy absorption and maximum operating frequency are measured at room temperature (20 to 25°C). Type Shock absorber Short type O.D. thread size/Stroke Applicable model Option Bumper Specifications 1862