LUXXO · SHARED DESIGN · READ ONLY

Rack-and-pinion parallel servo gripper v1

A parallel-jaw gripper with a 20T module-1 involute pinion on a standard 180° servo driving two opposed racks; each rack carries a jaw sliding on its own Ø5 guide rod, giving 0–60 mm symmetric opening, replaceable fingertip pads and 4×M4 flange mounting holes on the back.

Files

Flagged by the engineer

  • Jaw gripping force acts 40-60 mm above the guide rod: moment is reacted over only a 10 mm carrier bushing length -> consider a longer carrier or dual rods for heavy loads
  • Servo body protrudes 27 mm behind the back face; the robot flange adapter needs a servo clearance pocket or standoffs
  • Rack extends to x = ±38 at full opening, 1 mm clearance to pocket wall - do not exceed 60 mm opening
  • Backlash in servo gear train directly affects jaw position repeatability

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Specification

Opening range0 - 60 mm
Servo rotation for full travel171.9°
Pinionm=1, z=20, d_p=20 mm, b=8 mm
Rackm=1, 41 mm, 13 teeth
Grip force per jaw~50 N (1.0 Nm servo)
Body90 x 50 x 30 mm (25 base + 5 cover)
Flange holes4x M4 on 76 x 38 mm pattern
Overall size90.5 × 50.5 × 97 mm
Parts23
MaterialAluminium (6061)
Mass (calculated)391.6 g
General tolerance± 0.2 mm (ISO 2768-m)
Processmachining

Standard parts · purchasable

12×Socket head cap screw M3x8
ISO 4762
1×Socket head cap screw M3x6
ISO 4762

Parts list

01body
90 × 50 × 25 mm · 165.6 g
02cover
90 × 50 × 5 mm · 49.7 g
03pinion
21.92 × 21.92 × 8 mm · 6.0 g
04servo
55 × 20 × 42 mm · 80.0 g
05jaw_right
46 × 30 × 60 mm · 33.8 g
06jaw_left
46 × 30 × 60 mm · 33.8 g
07pad_right
5 × 20 × 20 mm · 4.8 g
08pad_left
5 × 20 × 20 mm · 4.8 g
09guide_rod_right
86 × 5 × 5 mm · 4.6 g
10guide_rod_left
86 × 5 × 5 mm · 4.6 g
11cover_screw_1
5.5 × 5.5 × 11 mm · 0.3 g
12cover_screw_2
5.5 × 5.5 × 11 mm · 0.3 g
13cover_screw_3
5.5 × 5.5 × 11 mm · 0.3 g
14cover_screw_4
5.5 × 5.5 × 11 mm · 0.3 g
15servo_screw_1
5.5 × 5.5 × 11 mm · 0.3 g
16servo_screw_2
5.5 × 5.5 × 11 mm · 0.3 g
17servo_screw_3
5.5 × 5.5 × 11 mm · 0.3 g
18servo_screw_4
5.5 × 5.5 × 11 mm · 0.3 g
19pad_screw_r1
11 × 5.5 × 5.5 mm · 0.3 g
20pad_screw_l1
11 × 5.5 × 5.5 mm · 0.3 g
21pad_screw_r2
11 × 5.5 × 5.5 mm · 0.3 g
22pad_screw_l2
11 × 5.5 × 5.5 mm · 0.3 g
23pinion_screw
5.5 × 5.5 × 9 mm · 0.3 g