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Hydrostatic Reducer Technical Analysis
The hydrostatic reducer is a core power regulation device in hydraulic transmission systems, enabling precise speed control and torque amplification through efficient conversion between hydraulic and mechanical energy. Below is a professional technical description.
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Core Definition
The Hydrostatic Reducer is an integrated compound transmission device combining a hydraulic motor with a planetary gear reduction mechanism. It operates on hydrostatic principles (Pascal's Law) to achieve:
Stepless speed regulation (continuously adjustable from 0 to max)
Torque multiplication (typical reduction ratios of 50:1 to 100:1)
Bidirectional power transmission (seamless forward/reverse switching)
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What is the advantages of Hydrostatic Reducers
Hydrostatic reducers offer unique performance benefits that make them indispensable in heavy-duty industrial applications. Here are their key advantages:
1. Superior Power Density
Delivers 3-5x higher torque output than mechanical reducers of equivalent size
Achieves power-to-weight ratios exceeding 300 Nm/kg in compact designs
Enables direct mounting on wheel hubs without intermediate drivelines
2. Precision Motion Control
Provides true stepless speed regulation (0 to max RPM with infinite variability)
Maintains ±1% speed accuracy under fluctuating loads
Enables micro-meter level positioning in closed-loop systems
3. Extreme Load Capability
Withstands 500% momentary overloads without damage
Features shock-resistant gear teeth (case-hardened to HRC 60+)
Incorporates pressure-compensated bearings for impact loads
4. Energy Efficiency
Achieves system efficiencies up to 92% with optimized hydraulics
Enables regenerative braking (recovering >60% of deceleration energy)
Reduces idling losses by 70% compared to mechanical transmissions
5. Environmental Adaptability
Operates reliably in -40°C to 120°C temperature ranges
Withstands IP69K protection (high-pressure washdown environments)
Features corrosion-resistant coatings (500+ hour salt spray test)
6. Maintenance Benefits
5x longer service intervals than gear reducers (up to 10,000 hours)
Modular design allows component-level replacement
Condition monitoring ports for predictive maintenance
7. Application Flexibility
Seamless bidirectional operation without clutch engagement
Torque multiplication up to 200:1 in single-stage units
Mounting position independence (any orientation operation)
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The Drawing and Technical Parameters

Model |
Torque (N.m) |
Speed (r/min) |
Reduction Ratio |
Pressure (MPa) |
Total |
Hydraulic motor |
Gross weight (Kg) |
Approx. weight of machine (T) |
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Rated |
Max. |
Rated |
Max |
Model |
Displacement (ml/r) |
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BKY2-460F01Z |
950 |
1200 |
3-138 |
5.75 |
16 |
21 |
463 |
BM5-80 |
80.5 |
28 |
0.5~0.8 |
BKY2-570F01Z |
1100 |
1450 |
3-130 |
5.75 |
16 |
21 |
575 |
BM5-100 |
100 |
28 |
0.6~1.0 |
BKY2-715F01Z |
1350 |
1700 |
3-110 |
5.75 |
16 |
21 |
722 |
BM5-125 |
125.7 |
28 |
1.0~1.3 |
BKY2-920FO1Z |
1750 |
2300 |
3-83 |
5.75 |
16 |
21 |
918 |
BM5-160 |
159.7 |
28 |
1.2~1.5 |
BKY2-1150FO1Z |
2200 |
3000 |
3-67 |
5.75 |
16 |
21 |
1150 |
BM5-200 |
200 |
28 |
1.5~2.5 |
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Payment terms, Delivery and Service
Payment: 30%deposit,70% before shipment. All the payment can be negotiated, generally by T/T .
Delivery: 20-25 days after receipt of your payment.
Service: 24 hours online service, technical overseas service.

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FAQ
Q: What kind of equipment that I can used on this BKY2 travel motor?
A: It can be used in a lot of kinds, for example excavators, loaders, drilling rigs, agricultural machinery and so on.
Q: Can you supply customized service?
A: Yes, we can customize the gearbox according to your demand and OEM is also available.
Q: Is your brand can be perfectly replaced and interchanged?
A: Yes, our models are same as Kawasaki BKY series.
Q: How's your warranty period?
A: We can give you one year after sales warranty.
Q: What's your MOQ?
A: 1 set.
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