Harmonic Drive LLC | 247 Lynnfield St. Peabody, MA 01960 | 800-921-3332
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FR-2

The FR pancake gear consists of four main parts: Wave Generator, Flexspline, Dynamic Spline, and Circular Spline. When assembled, rotation of the Wave Generator as a high speed input member imparts a rotating elliptical shape to the Flexspline. This causes progressive engagement of its external teeth with the internal teeth of the Circular Spline. The fixed Circular Spline, having a larger number of teeth than the Flexspline causes the latter to precess at a rate determined by the ratio of tooth difference to the total number of teeth. With the same number of teeth as the Flexspline, The Dynamic Spline rotates with, and at the same speed as, the Flexspline and is the output member of the drive.

Key Features:

  • Maximum reduction ratio in minimum space
  • Low backlash
  • Simple installation and maintenance
  • FR is a heavy duty version of the FB
  • FR uses a double wave generator bearing

(click to enlarge)

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Part Number Ratio Limit for Repeated Peak Torque Limit for Momentary Peak Torque
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Part Number Ratio Limit for Repeated Peak Torque Limit for Momentary Peak Torque
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FR-14-50-2-GR 50 5.4 13.7
FR-14-88-2-GR 88 9.8 19.6
FR-14-100-2-GR 100 13.7 19.6
FR-14-110-2-GR 110 13.7 19.6
FR-20-50-2-GR 50 34 69
FR-20-80-2-GR 80 41 72
FR-20-100-2-GR 100 53 94
FR-20-128-2-GR 128 67 102
FR-20-160-2-GR 160 77 86
FR-25-50-2-GR 50 55 108
FR-25-80-2-GR 80 69 122
FR-25-100-2-GR 100 91 160
FR-25-120-2-GR 120 108 190
FR-25-160-2-GR 160 135 172
FR-25-200-2-GR 200 147 172
FR-32-50-2-GR 50 108 216
FR-32-78-2-GR 78 137 245
FR-32-100-2-GR 100 176 323
FR-32-131-2-GR 131 255 451
FR-32-157-2-GR 157 294 500
FR-32-200-2-GR 200 314 372
FR-32-260-2-GR 260 314 372
FR-40-50-2-GR 50 196 353
FR-40-80-2-GR 80 245 431
FR-40-100-2-GR 100 314 549
FR-40-128-2-GR 128 392 686
FR-40-160-2-GR 160 461 813
FR-40-200-2-GR 200 529 745
FR-40-258-2-GR 258 627 745
FR-50-80-2-GR 80 440 784
FR-50-100-2-GR 100 578 1,019
FR-50-120-2-GR 120 696 1,225
FR-50-160-2-GR 160 833 1,470
FR-50-200-2-GR 200 960 1,411
FR-50-242-2-GR 242 1,176 1,411
FR-65-78-2-GR 78 921 1,617
FR-65-104-2-GR 104 1,340 2,360
FR-65-132-2-GR 132 1,650 2,890
FR-65-158-2-GR 158 1,970 3,450
FR-65-208-2-GR 208 2,180 2,590
FR-65-260-2-GR 260 2,200 2,590
FR-80-80-2-GR 80 1,640 2,870
FR-80-96-2-GR 96 2,050 3,590
FR-80-128-2-GR 128 2,820 4,960
FR-80-160-2-GR 160 3,380 5,940
FR-80-194-2-GR 194 4,300 6,900
FR-80-258-2-GR 258 4,350 5,170
FR-80-320-2-GR 320 4,350 5,170
FR-100-80-2-GR 80 2,870 5,040
FR-100-100-2-GR 100 3,940 6,920
FR-100-120-2-GR 120 4,780 8,400
FR-100-160-2-GR 160 6,230 10,950
FR-100-200-2-GR 200 7,090 12,440
FR-100-242-2-GR 242 7,960 9,410
FR-100-320-2-GR 320 7,960 9,410

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