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Bosch Rexroth 0608800048 GK2A251 Straight Output Drive
1️⃣Key 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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0608800048
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Type Code
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GK2A251
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Family
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Tightening spindle – Straight Output Drive
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Size
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4
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Output
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1/2″ square (SZ4 1/2″ SQ)
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Max Torque
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150 Nm
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Working Range
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Up to 150 Nm (lower limit depends on gearbox + transducer config)
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Spring Travel
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50 mm
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Spring Force
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30 – 93 N
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Reduction Ratio
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1 : 1
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Avg. Efficiency
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1.0 (direct drive head, no internal gearing)
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Length A
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251 mm
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Installation Length
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265 mm
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Weight
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1.0 kg (catalog); ~1.59 kg unpacked listing variant
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Mounting
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Modular interface to size-4 adapter (4A / 4AR) + planetary gearbox
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Axial Compensation
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Yes, spring-loaded float
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Transducer Ready
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Yes, via 4DMC060/160 measurement transducer + 4AR redundant adapter
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Series
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Rexroth tightening spindle modular system (VDI-conform)
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2️⃣Core Features
- Straight in-line output, 1/2″ square, size-4 modular dock
- 150 Nm max, 50 mm axial spring compensation
- Maintenance-free for ~1 million full-load cycles (system rating)
- Accepts redundant 4DMC transducer via 4AR adapter
- VDI-standard interface for fast spindle rebuilding
- Interchangeable with GK2B251 / GK2C251 variants (different spring/code options)
3️⃣Typical Applications
- Automotive body / chassis / engine multi-spindle tightening cells
- Battery-pack and e-mobility assembly stations
- Wheel-nut runners (special transverse-force versions on request)
- Any Rexroth 350-system axis needing a straight 1/2″ square nose with float
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