{"id":888,"date":"2026-06-18T01:40:22","date_gmt":"2026-06-18T01:40:22","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=888"},"modified":"2026-06-18T01:40:22","modified_gmt":"2026-06-18T01:40:22","slug":"601l1a-planetary-wheel-drive-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ar\/product\/601l1a-planetary-wheel-drive-gearbox\/","title":{"rendered":"601L1A Planetary Wheel Drive Gearbox \u2014 Single-Stage"},"content":{"rendered":"
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EP-601 Series \u00b7 Single-Stage Wheel Drive<\/div>\n

601L1A
\nThe Lightest Wheel Drive in the Catalogue<\/span><\/h2>\n

Most planetary wheel drive gearboxes pack two or three planetary stages into the housing. The 601L1A uses one. That single stage at 5.77:1 ratio is all that separates the hydraulic motor shaft from the wheel \u2014 and with fewer gears meshing, less energy is wasted as heat, fewer parts can wear, and the unit weighs barely more than a car tyre. For compact machines that do not need high reduction but absolutely need reliability and maximum efficiency per kilogram, this is the wheel drive to specify.<\/p>\n

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1,750<\/div>\n
Nm Output<\/div>\n<\/div>\n
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96%<\/div>\n
\u0643\u0641\u0627\u0621\u0629<\/div>\n<\/div>\n
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45<\/div>\n
kg Dry<\/div>\n<\/div>\n
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5.77<\/div>\n
\u0646\u0633\u0628\u0629<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\"601L1A<\/div>\n<\/div>\n<\/section>\n

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601L1A Wheel Drive Planetary Gearbox \u2014 Full Specification<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Output torque (rated max)<\/td>\n1,750 Nm<\/td>\n<\/tr>\n
\u0646\u0633\u0628\u0629 \u0627\u0644\u062a\u0631\u0648\u0633<\/td>\n5.77 :1 (single planetary stage)<\/td>\n<\/tr>\n
Maximum input speed<\/td>\n1,000 rpm<\/td>\n<\/tr>\n
Mechanical efficiency<\/td>\n\u2265 96%<\/td>\n<\/tr>\n
Parking brake<\/td>\n450 – 600 Nm, spring-applied, hydraulic release<\/td>\n<\/tr>\n
Emergency towing<\/td>\nManual declutch (free-wheel disconnect)<\/td>\n<\/tr>\n
Wheel mounting<\/td>\nRotating flange, SAE\/ISO bolt circle<\/td>\n<\/tr>\n
Dry weight<\/td>\nApprox. 45 kg<\/td>\n<\/tr>\n
\u062a\u0634\u062d\u064a\u0645<\/td>\nOil bath splash, API GL-5 EP gear oil<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-25 to +85 deg C (Viton seals optional for extremes)<\/td>\n<\/tr>\n
Gear material<\/td>\nCarburised alloy steel, CNC ground, HRC 58-62<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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Why a Single-Stage Planetary Wheel Drive Delivers More Than It Appears<\/h2>\n
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Every other wheel drive planetary gearbox<\/a> in the Korea Ever-Power catalogue uses two or three planetary stages. The 601L1A uses one. That sounds like a limitation, but for machines that operate at moderate ground speeds (under 15 km\/h) and draw torque from low-speed, high-displacement hydraulic motors, the single stage is the mechanically optimal solution.<\/p>\n

Fewer gears meshing means 96% efficiency instead of the 93-95% typical of multi-stage planetary wheel drives. It means one fewer set of planet gears to inspect, one fewer sun gear that can wear, and roughly 40% less weight than a two-stage drive of equivalent torque class. On battery-electric or hybrid-electric compact vehicles, that efficiency gain extends range in a way that is difficult to achieve through any other single drivetrain change.<\/p>\n<\/div>\n

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Single-Stage vs Multi-Stage<\/h3>\n
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96%<\/strong> efficiency vs 93-95%<\/p>\n

45 kg<\/strong> vs 85-135 kg (2-stage)<\/p>\n

3<\/strong> planet gears vs 6-9 (multi-stage)<\/p>\n

1<\/strong> bearing set vs 2-3 sets<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\"601L1A<\/p>\n

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Wheel Drive Sizing \u2014 Will 1,750 Nm Move Your Machine?<\/h2>\n

Selecting a planetary wheel drive gearbox starts with a question of physics: does the torque at the wheel overcome the resistance forces at the tyre contact patch? The calculation below applies to any wheel drive, not just the 601L1A \u2014 the method is universal.<\/p>\n

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\u2460<\/div>\n

Find the required tractive force<\/h3>\n

F = GVW x (rolling resistance + gradient). For a 3,000 kg compact loader on firm soil (rolling resistance 0.04) climbing a 15% grade: F = 3,000 x 9.81 x (0.04 + 0.15) = 5,592 N. With two wheel drives sharing the load equally, each drive must produce 2,796 N at the tyre contact patch.<\/p>\n<\/div>\n

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\u0662<\/div>\n

Convert to torque at the wheel<\/h3>\n

T = F x tyre radius. For a 400 mm rolling radius tyre: T = 2,796 x 0.40 = 1,118 Nm per wheel. The 601L1A delivers 1,750 Nm, providing a safety factor of 1.57 \u2014 well above the minimum 1.3 recommended for off-road applications with variable terrain.<\/p>\n<\/div>\n

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\u2462<\/div>\n

Verify maximum speed<\/h3>\n

V = (motor rpm \/ ratio) x tyre circumference x 60 \/ 1,000,000. At 800 rpm motor input with 5.77 ratio and 0.4 m radius: V = (800 \/ 5.77) x (2 x 3.14 x 0.4) x 60 \/ 1,000,000 = 20.9 km\/h. If your required top speed exceeds the calculated value, increase the hydraulic motor displacement or pump flow \u2014 not the gear ratio.<\/p>\n<\/div>\n<\/div>\n

Rule of thumb: <\/span>
\nThe 601L1A is correctly sized for wheeled machines up to approximately 4,000 kg GVW on moderate terrain (grades under 20%, firm to soft soil). Above 4,000 kg or on steep gradients, step up to the 603L2A (4,000 Nm) or 602L2 (5,000 Nm).<\/span><\/div>\n<\/section>\n

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Manual Declutch \u2014 The Feature That Separates a Good Wheel Drive from a Costly Breakdown<\/h2>\n
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When a hydraulic system fails in the field \u2014 a burst hose, a dead pump, an electrical fault \u2014 the machine is stranded. Without a declutch, towing it back to the workshop means dragging the wheels against the locked gearbox and pressurised hydraulic motor. The result is usually a destroyed motor, blown seals, and an overheated gearbox that needs a full rebuild on top of the original repair.<\/p>\n

The 601L1A solves this with a manual declutch lever accessible from outside the housing. One pull disconnects the planet carrier from the wheel hub, allowing the wheel to spin freely. The machine can then be towed at low speed (under 10 km\/h) back to the workshop without any damage to the hydraulic circuit or the gearbox internals. Re-engaging the clutch takes seconds once the hydraulic system is repaired.<\/p>\n

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Engaged (Normal)<\/div>\n
Planet carrier locked to hub. Full torque transmission. Parking brake active.<\/div>\n<\/div>\n
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Disengaged (Tow)<\/div>\n
Carrier disconnected. Wheel free-spins. No hydraulic back-pressure. Safe towing.<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\"Wheel<\/div>\n<\/div>\n<\/section>\n

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Compact Wheel Drive Applications Under 4 Tonnes GVW<\/h2>\n

\"Compact<\/p>\n

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Compact Wheel Loaders and Skid-Steer Variants<\/h3>\n

Sub-4-tonne wheel loaders used in landscaping, nursery operations, and small construction sites. These machines rarely exceed 12 km\/h travel speed and spend most of their operating hours in low-speed, high-traction manoeuvres \u2014 loading, grading, pushing. The 601L1A single-stage efficiency means less hydraulic flow is wasted as gearbox heat, so the same pump that drives the wheels can share more capacity with the loader arms and auxiliary hydraulics.<\/p>\n<\/div>\n

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Turf Maintenance and Golf Course Equipment<\/h3>\n

Ride-on mowers, turf sprayers, and fairway rollers that must cross soft turf without leaving ruts. The 45 kg dry weight minimises ground pressure contribution from the drivetrain itself \u2014 important when every kilogram on the axle matters for turf compaction. The sealed oil-bath lubrication eliminates the grease nipples and open gears that would otherwise deposit lubricant onto playing surfaces.<\/p>\n<\/div>\n

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Electric and Hybrid Utility Vehicles<\/h3>\n

Battery-electric personnel carriers, warehouse tow tractors, and airport ground support vehicles where the 96% gearbox efficiency directly extends battery range. On a vehicle with a 10 kWh battery pack, switching from a 94% efficient two-stage drive to the 96% single-stage 601L1A recovers approximately 0.2 kWh per full discharge cycle \u2014 equivalent to 2-3 km of additional range depending on vehicle weight and terrain.<\/p>\n<\/div>\n<\/div>\n

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Quick-Fit Vehicle Reference<\/h3>\n