Cycloidal gear reducer B series

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Product overview
The Fine Cyclo B-Series Type FC is a compact cycloidal gearbox designed for precision reduction tasks in automation. It features a cylindrical housing, lifetime lubrication and optional modular motor attachment for easy integration.

Key features

• No mechanical backlash (lost motion <1 arcmin)
• Prefilled lubrication (lubricated for life)
• Compact cylindrical housing
• High overload capacity and efficiency
• Five gear ratios available depending on size

Input shaft variants

• Keyway (standard)
• Clamping ring (standard)
• Splined shaft (optional)

Overview - key product data
No mechanical backlash
Lost motion: <1 arcmin
Sizes: B15, B25, B35, B45
Reduction ratios: 29:1 / 59:1 / 89:1 / 119:1 / 179:1 (availability depending on size)
Nominal output torque: 179 Nm to 1,569 Nm (at n1 = 1,500 rpm)
Acceleration torque: 417 Nm to 3,189 Nm
Max. short-term peak torque: 834 Nm to 6,378 Nm
Input speed: up to 6,400 rpm
Torsional rigidity: up to 540 Nm/arcmin

Most important product data / Features

• High cost efficiency
• Compact design
• Lubricated for life
• Small mass moments of inertia
• High overload capacity (peak torque for emergency stop up to 6,378 Nm)
• High efficiency

Main dimensions and weight
Size | Length L [mm] | Diameter G [mm] | Diameter D [mm] | Diameter d1 (1) [mm] | Weight [kg]
B15 | 71.5 | 120 | 90 | 19 | 3.5
B25 | 81.3 | 147 | 114 | 24 | 6
B35 | 93.5 | 184 | 140 | 32 | 11.4
B45 | 109 | 220 | 174 | 38 | 19.4

Main data - Torque and speed
Size | Nominal output torque (1) [Nm] | Acceleration/braking torque [Nm] | Average drive speed (2) [rpm] | Max. drive speed [rpm]
B15 (i 29) | 218 | 417 | 4,640 | 6,230
B15 (i 89) | 232 | 417 | 5,800 | 6,400
B25 (i 29) | 419 | 721 | 3,100 | 5,360
B25 (i 59) | 449 | 883 | 4,200 | 5,490
B35 (i 29,59) | 741 | 1,336 | 2,080 | 4,270
B35 (i 89,119) | 820 | 1,717 | 2,600 | 4,330
B45 (i 29) | 1,000 | 3,189 | 1,760 | 3,450
B45 (i 119) | 1,569 | 3,189 | 2,200 | 3,500
(1) At drive speed n1 = 1,500 rpm; up to. (2) At 50% duty cycle / 20°C drive temperature.

Available ratios
Size | Ratios
B15 | 29 / 59 / 89 / 119
B25 | 29 / 59 / 89 / 119
B35 | 29 / 59 / 89 / 119
B45 | 29 / 59 / 89 / 119 / 179

Recommended application notes
The Fine Cyclo B-Series Type FC is intended for cost-efficient precision reduction in automation systems. Typical applications include integrated motor-mounted drives and systems requiring extremely low lost motion and high emergency-stop overload capacity.

Technical specifications

• No mechanical backlash
• Lost motion: <1 arcmin
• Sizes available: B15, B25, B35, B45
• Reduction ratios: 29:1, 59:1, 89:1, 119:1, 179:1 (size-dependent)
• Nominal output torque range: 179 Nm – 1,569 Nm (at 1,500 rpm)
• Acceleration torque range: 417 Nm – 3,189 Nm
• Max short-term peak torque: 834 Nm – 6,378 Nm
• Input speed up to 6,400 rpm
• Torsional rigidity up to 540 Nm/arcmin
• Main dimensions and weights by size: see table above
• Pre-filled lubrication (lubricated for life)
• Input shaft options: keyway, clamping ring, splined shaft (optional)
• Compact cylindrical housing; modular motor attachment available