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Bosch Rexroth 0608720040 4GE59 SZ4 Planetary Gear Unit
Key Specifications
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Specification
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Detail
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Brand
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Bosch Rexroth
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Material No.
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0608720040
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Type Code
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4GE59
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Size / Series
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SZ4 (Size 4 tightening system)
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Type
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Planetary gear unit (coaxial)
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Reduction Ratio
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58.6 : 1
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Avg. Efficiency
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0.9
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Installation Length
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105.5 mm
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Weight
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1.1 kg (catalog; some listings 1.3 kg incl. packaging)
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Input Interface
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EC304 servo motor output shaft (size-4 dock)
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Output Interface
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Size-4 adapter (4A / 4AR) or 4DMC transducer
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Mounting
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In-line between EC motor and adapter/output drive
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Duty
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Maintenance-free for 1 million full-load cycles (system rating)
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Environment
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Industrial tightening-cell duty (IP handled by adjacent output drive / spindle bearing)
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Origin
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Germany
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Core Features
- 58.6:1 coaxial planetary reduction in 105.5 mm
- ~90 % average efficiency, low backlash for torque accuracy
- Size-4 VDI-style modular dock—swaps with 4GE19 when ratio change needed
- No electronics: pairs with 4DMC non-contact transducer for closed-loop torque/angle
- Designed for 1 million full-load cycles maintenance-free
Typical Applications
- Automotive body / chassis / engine multi-spindle tightening
- Battery-pack and e-mobility bolt cells
- Feed-output tightening spindles (4S1M8 + 4GE59 + EC304)
- Angle-head spindles needing high ratio (4W130/4W220 + 4GE59)
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