Cycloidal gear reducer B series

coaxialkeyed boresplined shaft

Short description
Compact, fully sealed cycloidal gearbox for industrial automation applications with extremely low backlash and lifetime lubrication.

Overview
All-rounder gearbox suitable for a wide range of automation tasks. Cylindrical compact housing designed for direct integration into drive systems.

• Backlash: <1 arcmin (lost motion)
• Fully sealed and ready for use
• Maintenance-free, lubricated for life
• Available in 4 sizes (B15, B25, B35, B45)
• Five reduction ratios depending on size
• Modular motor mounting options

Input shaft variants

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

Key product data (overview table)
No mechanical backlash
Lost motion: <1 arcmin
Sizes: 4 (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 4,000 Nm
Max. short-term peak torque: 834 Nm to 8,000 Nm
Input speed: up to 6,400 rpm
Max. permissible bending moment: 883 Nm to 4,000 Nm
Bending stiffness: 510 Nm to 2,450 Nm
Axial load capacity: 3,924 N to 15,000 N
Torsional rigidity: up to 540 Nm/arcmin

Most important product data (highlights)
Acceleration torque: up to 4,000 Nm
Highest single-stage ratio: 179:1
Smallest housing diameter: 126 mm (B15)

Main dimensions and weight
Table header: Size | Length L [mm] | Diameter G [mm] | Diameter D [mm] | Diameter d1 (1) [mm] | Weight [kg]
B15 | 72.5 | 126 | 90 | 19 | 4.9
B25 | 81.3 | 156 | 114 | 24 | 8.4
B35 | 93.5 | 186 | 140 | 32 | 14.1
B45 | 108.5 | 231 | 174 | 38 | 24.3
Diameter G = Housing diameter
Diameter D = Output main diameter
Diameter d1 = Drive shaft diameter
(1) Maximum values, adapted to the customer motor

Main data — Torque and speed
Table header: Size | Nominal output torque (1) [Nm] | Acceleration/braking torque [Nm] | Average drive speed (2) [rpm] | Max. drive speed [rpm]
B15 — (i 29) 218 Nm; (i 59, 89, 119) 232 Nm | Acceleration/braking torque 417 Nm / 613 Nm | Average drive speed 4,200 / 5,600 rpm | Max. 6,230 / 6,400 rpm
B25 — (i 29) 419 Nm; (i 59, 89, 119) 449 Nm | Acceleration/braking torque 721 Nm / 1,029 Nm | Average drive speed 3,100 / 4,200 rpm | Max. 5,360 / 5,490 rpm
B35 — (i 29) 741 Nm; (i 59, 89, 179) 820 Nm | Acceleration/braking torque 1,336 Nm / 1,960 Nm | Average drive speed 2,500 / 3,300 rpm | Max. 4,270 / 4,330 rpm
B45 — (i 29) 1,000 Nm; (i 59, 89, 179) 1,569 Nm | Acceleration/braking torque 3,189 Nm / 4,000 Nm | Average drive speed 1,900 / 2,600 rpm | Max. 3,450 / 3,500 rpm
(1) At drive speed n1 = 1500 rpm; (2) At 50 % duty cycle

Output bearing capacity
Table header: Size | Max. permissible bending moment [Nm] | Max. permissible axial load push/pull [N]
B15 | 883 | 3,924
B25 | 1,660 | 5,220
B35 | 2,700 | 9,000
B45 | 4,000 | 15,000

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

Features / Benefits

• Compact cylindrical design for space-saving integration
• High torsional rigidity up to 540 Nm/arcmin
• High overload capacity — short-term peak torque up to 4,000 Nm
• High mechanical efficiency
• Completely sealed and maintenance-free for life
• Lubricated for life in any installation position

Characteristics / Technical specifications

• Series / type: Fine Cyclo B-Series Type F4C
• Lost motion (backlash): <1 arcmin
• Sizes available: B15, B25, B35, B45 (4 sizes)
• Reduction ratios (depending on size): 29:1, 59:1, 89:1, 119:1, 179:1
• Nominal output torque range: 179 Nm to 1,569 Nm (at n1 = 1,500 rpm)
• Acceleration torque range: 417 Nm to 4,000 Nm
• Max short-term peak torque: 834 Nm to 8,000 Nm
• Input speed: up to 6,400 rpm
• Max permissible bending moment: 883 Nm to 4,000 Nm
• Bending stiffness: 510 Nm to 2,450 Nm
• Axial load capacity: 3,924 N to 15,000 N
• Torsional rigidity: up to 540 Nm/arcmin
• Smallest housing diameter: 126 mm (B15)
• Weight range (by size): B15 = 4.9 kg; B25 = 8.4 kg; B35 = 14.1 kg; B45 = 24.3 kg
• Input shaft options: keyway, clamping ring, splined shaft (optional)
• Housing: compact cylindrical, fully sealed