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A planetary gearbox is a compact and efficient gear system that transmits torque by utilizing a central sun gear, multiple planet gears, and an outer ring gear. The planetary gears rotate around the sun gear while simultaneously meshing with the ring gear, allowing for high torque transmission, smooth operation, and high gear ratios within a small footprint. Widely used in robotics, automation, and industrial machinery, planetary gearboxes are valued for their durability, high efficiency—up to 98%—and ability to handle heavy loads with stability. Their design enables high power density and reduced size, making them ideal for applications requiring precise control and reliable performance.
Planetary gearboxes are highly capable of transmitting large amounts of torque because the load is shared among multiple planetary gears, enhancing both stability and durability. They are highly efficient, with minimal energy loss, achieving up to 98% efficiency in the first stage.
These gear systems are known for their compact design and high power density, outperforming many other gear types in terms of size and performance. The incorporation of an external ring gear further reduces the overall size and weight of the gearbox.
Jkongmotor brings over 15 years of expertise in manufacturing stepper motors and brushless DC motors. We also provide worm gearboxes, planetary gearboxes, brakes, encoders, drivers, integrated servo motors, and other motor-related products. We welcome your inquiries.
Product Type: HPS42 Nema 17 Planetary Gearbox
Suitable Motor：Nema 17 42mm stepper motor or bldc motor
Feature summary：Low Inertia、Low Noise、High Torque
Place of Origin：china
Minimum order quantity：10pcs
Material Science：stator, rotor, stainless steel shaft, copper wire, magnetic steel...
Applicatin Scope: 42mm Nema 17 stepping motor or brushless dc motor
Packing：The sample is packed in carton,the batch with plastic pallet
Delivery time：Standard product: 7-10days
Customized product: 25-30days
Transaction mode：EXW, FOB, FCA, CIF, FAS, CFR, CPT, CIP, DAF, DEQ, DDU, DDP...
| Model | / | JK-HPS42-L1 | JK-HPS42-L2 | ||||||||||
| Gear Ratio | / | 4 | 5 | 7 | 10 | 16 | 20 | 25 | 28 | 35 | 40 | 50 | 70 |
| Gear Trains | / | 1 | 2 | ||||||||||
| Gearbox Length | mm | 60 | 71 | ||||||||||
| Rated Torque | N.m | 9 | 9 | 5 | 5 | 12 | 12 | 10 | 10 | 10 | 10 | 10 | 10 |
| Sundden Stop Torque | N.m | 18 | 18 | 10 | 10 | 24 | 24 | 20 | 20 | 20 | 20 | 20 | 20 |
| Back Lash | arcmin | ≤15 arcmin | ≤20 arcmin | ||||||||||
| Efficiency | % | 96 | 94 | ||||||||||
| Suitable Motor Dimension | mm | Φ5-10 / Φ22-2 / F31-M3 | Φ5-10 / Φ22-2 / F31-M3 | ||||||||||
| Rated Input Speed | Rpm | 3000 | 3000 | ||||||||||
| Max Input Speed | Rpm | 6000 | 6000 | ||||||||||
| Average Life Span | h | 20000 | 20000 | ||||||||||
| Axial Force | N | 100 | 100 | ||||||||||
| Radial Force | N | 300 | 300 | ||||||||||
| Noise | dB | ≤65 | ≤65 | ||||||||||
| Protection Level | IP | IP54 | IP54 | ||||||||||
| Work Temp. | ℃ | -20 to +150 | -20 to +150 | ||||||||||
| Out Shaft Type | / | Key Shaft Type | Key Shaft Type | ||||||||||
| Model | / | JK-HPS42-L1SW | JK-HPS42-L2SW | ||||||||||
| Gear Ratio | / | 4 | 5 | 7 | 10 | 16 | 20 | 25 | 28 | 35 | 40 | 50 | 70 |
| Gear Trains | / | 1 | 2 | ||||||||||
| Gearbox Length | mm | 75 | 86 | ||||||||||
| Rated Torque | N.m | 9 | 9 | 5 | 5 | 12 | 12 | 10 | 10 | 10 | 10 | 10 | 10 |
| Sundden Stop Torque | N.m | 18 | 18 | 10 | 10 | 24 | 24 | 20 | 20 | 20 | 20 | 20 | 20 |
| Back Lash | arcmin | ≤15 arcmin | ≤20 arcmin | ||||||||||
| Efficiency | % | 96 | 94 | ||||||||||
| Suitable Motor Dimension | mm | Φ5-24 / Φ22-2 / F31-M3 | Φ5-10 / Φ22-2 / F31-M3 | ||||||||||
| Rated Input Speed | Rpm | 3000 | 3000 | ||||||||||
| Max Input Speed | Rpm | 6000 | 6000 | ||||||||||
| Average Life Span | h | 20000 | 20000 | ||||||||||
| Axial Force | N | 100 | 100 | ||||||||||
| Radial Force | N | 300 | 300 | ||||||||||
| Noise | dB | ≤65 | ≤65 | ||||||||||
| Protection Level | IP | IP54 | IP54 | ||||||||||
| Work Temp. | ℃ | -20 to +150 | -20 to +150 | ||||||||||
| Out Shaft Type | / | Key Shaft Type | Key Shaft Type | ||||||||||
| Model No. | Step Angle | Motor Length | Current | Resistance | Inductance | Holding Torque | # of Leads | Detent Torque | Rotor Inertia | Mass |
| ( °) | (L)mm | A | Ω | mH | kg.cm | No. | g.cm | g.cm2 | Kg | |
| JK42HS25-0404 | 1.8 | 25 | 0.4 | 24 | 36 | 1.8 | 4 | 75 | 20 | 0.15 |
| JK42HS28-0504 | 1.8 | 28 | 0.5 | 20 | 21 | 1.5 | 4 | 85 | 24 | 0.22 |
| JK42HS34-1334 | 1.8 | 34 | 1.33 | 2.1 | 2.5 | 2.2 | 4 | 120 | 34 | 0.22 |
| JK42HS34-0406 | 1.8 | 34 | 0.4 | 24 | 15 | 1.6 | 6 | 120 | 34 | 0.22 |
| JK42HS34-0956 | 1.8 | 34 | 0.95 | 4.2 | 2.5 | 1.6 | 6 | 120 | 34 | 0.22 |
| JK42HS40-0406 | 1.8 | 40 | 0.4 | 30 | 30 | 2.6 | 6 | 150 | 54 | 0.28 |
| JK42HS40-1684 | 1.8 | 40 | 1.68 | 1.65 | 3.2 | 3.6 | 4 | 150 | 54 | 0.28 |
| JK42HS40-1206 | 1.8 | 40 | 1.2 | 3 | 2.7 | 2.9 | 6 | 150 | 54 | 0.28 |
| JK42HS48-0406 | 1.8 | 48 | 0.4 | 30 | 25 | 3.1 | 6 | 260 | 68 | 0.35 |
| JK42HS48-1684 | 1.8 | 48 | 1.68 | 1.65 | 2.8 | 4.4 | 4 | 260 | 68 | 0.35 |
| JK42HS48-1206 | 1.8 | 48 | 1.2 | 3.3 | 2.8 | 3.17 | 6 | 260 | 68 | 0.35 |
| JK42HS60-0406 | 1.8 | 60 | 0.4 | 30 | 39 | 6.5 | 6 | 280 | 102 | 0.5 |
| JK42HS60-1704 | 1.8 | 60 | 1.7 | 3 | 6.2 | 7.3 | 4 | 280 | 102 | 0.5 |
| JK42HS60-1206 | 1.8 | 60 | 1.2 | 6 | 7 | 5.6 | 6 | 280 | 102 | 0.5 |
| JK42HM34-1334 | 0.9 | 34 | 1.33 | 2.1 | 4.2 | 2.2 | 4 | 200 | 35 | 0.22 |
| JK42HM34-0316 | 0.9 | 34 | 0.31 | 38.5 | 33 | 1.58 | 6 | 200 | 35 | 0.22 |
| JK42HM34-0956 | 0.9 | 34 | 0.95 | 4.2 | 4 | 1.58 | 6 | 200 | 35 | 0.22 |
| JK42HM40-1684 | 0.9 | 40 | 1.68 | 1.65 | 3.2 | 3.3 | 4 | 220 | 54 | 0.28 |
| JK42HM40-0406 | 0.9 | 40 | 0.4 | 30 | 30 | 2.59 | 6 | 220 | 54 | 0.28 |
| JK42HM40-1206 | 0.9 | 40 | 1.2 | 3.3 | 3.4 | 2.59 | 6 | 220 | 54 | 0.28 |
| JK42HM48-1684 | 0.9 | 48 | 1.68 | 1.65 | 4.1 | 4.4 | 4 | 250 | 68 | 0.35 |
| JK42HM48-1206 | 0.9 | 48 | 1.2 | 3.3 | 4 | 3.17 | 6 | 250 | 68 | 0.35 |
| JK42HM48-0406 | 0.9 | 48 | 0.4 | 30 | 38 | 3.17 | 6 | 250 | 68 | 0.35 |
| JK42HM60-1684 | 0.9 | 60 | 1.68 | 1.65 | 5 | 5.5 | 4 | 270 | 106 | 0.55 |
Note: Above only for representative products, products of special request can be made according to the customer request.
| Specification | Unit | Model | |||
| JK42BLS01 | JK42BLS02 | JK42BLS03 | JK42BLS04 | ||
| Phase | 3 | ||||
| Number Of Poles | Poles | 8 | |||
| Rated Voltage | VDC | 24 | |||
| Rated Speed | Rpm | 4000 | |||
| Rated Torque | N.m | 0.0625 | 0.125 | 0.185 | 0.25 |
| Peak Current | Amps | 1.8 | 3.3 | 4.8 | 6.3 |
| Rated Power | W | 26 | 52.5 | 77.5 | 105 |
| Peak Torque | N.m | 0.19 | 0.38 | 0.56 | 0.75 |
| Peak Current | Amps | 5.4 | 10.6 | 15.5 | 20 |
| Back E.M.F | V/Krpm | 4.1 | 4.2 | 4.3 | 4.3 |
| Torque Constant | N.m/A | 0.039 | 0.04 | 0.041 | 0.041 |
| Rotor Inertia | g.cm2 | 24 | 48 | 72 | 96 |
| Body Length | mm | 41 | 61 | 81 | 100 |
| Weight | Kg | 0.3 | 0.45 | 0.65 | 0.8 |
| Sensor | Honeywell | ||||
| Insulation Class | B | ||||
| Degree of Protection | IP30 | ||||
| Storage Temperature | -25～+70℃ | ||||
| Operating Temperature | -15～+50℃ | ||||
| Working Humidity | 85% RH or below (no condensation) | ||||
| Working Environment | Outdoor (no direct sunlight), no corrosive gas, no flammable gas, no oil mist, no dust | ||||
| Altitude | 1000 meters or less | ||||
If this motor do not match with your request. Please feel free to contact with us,We can make customized shaft / winding / mounting flange / cable / connector / Encoder / Brake / Gearbox and others. We will works side-by-side with you and your team to design a motor that will fit the precise needs of your application. All Engineering and Support is done in-house.
