Description
EP Series — EPR Precision Planetary Gear Reducer — ISO 9001 Certified
EPR Planetary Gearbox Technical Specifications
The table below presents the rated values for the EPR planetary gear reducer. All figures reflect tested, production-unit data.
| Parameter | Value |
|---|---|
| Output Torque | — |
| Output Torque (2-Stage) | — |
| Available Ratios | — |
| Backlash Grades | ≤ 3 arcmin / ≤ 5 arcmin / ≤ 7 arcmin |
| Nominal Input Speed | 3,000–5,000 rpm |
| Max Input Speed | 10,000 rpm |
| Torsional Rigidity | ≥ 7 N·m/arcmin |
| Service Life | ≥ 20,000 hours |
| Efficiency | ≥ 95% |
| Operating Temperature | −10°C to +90°C |
| Lubrication | Synthetic lubricating oil |
| Protection | IP65 |
| Mounting | Any orientation |
| Noise | ≤ 65 dB(A) |
What Is the EPR Planetary Gear Reducer?
This inline precision planetary gearbox pairs helical-ground planet gears with a case-hardened sun gear to deliver — output torque. The aluminium alloy housing with IP65 sealing keeps weight low while protecting internals from dust and moisture. Backlash grades span from ≤ 3 arcmin (micro) through ≤ 7 arcmin (standard), and transmission efficiency reaches ≥ 95%.
Every gearbox leaves the factory with an individual QC certificate. Our gear reducer engineering team provides free application sizing and 3-D CAD models from our Condell Park NSW office.
Where the EPR Planetary Gearbox Fits
CNC and Machine-Tool Feed Drives
Ball-screw axes on lathes and milling centres require the torsional rigidity that the EPR delivers in a compact inline envelope, keeping machine footprint tight while handling combined cutting forces.
Packaging, Printing and Textile Machinery
With output torque of — and efficiency of ≥ 95%, the EPR cuts energy consumption versus worm gear alternatives while maintaining positional synchronisation across multi-axis servo lines.
Collaborative Robotics and Semiconductor Handling
Lightweight cobot joints and wafer-transfer stages prize minimal backlash (≤ 3 arcmin) and low noise (≤ 65 dB(A)). Contact us for custom output shaft options.
Key Components Inside the EPR Planetary Gearbox
Understanding the internal architecture helps engineers evaluate gear mesh quality and predict maintenance intervals. Below is a breakdown of the six core parts inside the EPR.
Case-hardened 20CrMnTi steel sun gear with helical tooth profile, ground to Ra 0.4 µm. Connects to the servo motor input shaft and distributes torque to the surrounding planet gears with minimal friction and noise.
Three equally-spaced planet gears orbit the sun gear while meshing with the ring gear. Multi-point load sharing delivers higher torque density and longer service life than single-mesh arrangements.
Forged alloy steel carrier holds the planet gears in equidistant positions and converts their orbital motion into a single rotary output. Withstands repeated shock loads without deformation.
Nitrided 42CrMo steel ring gear interference-fitted inside the aluminium housing. Maintains consistent backlash over the full rated service life.
Tapered roller output bearings handle combined radial/axial loads; deep-groove ball input bearings support high-speed rotation. Preload set during assembly for optimal stiffness.
CNC-machined aluminium alloy housing with double-lip FKM seals at both flanges. IP65 protection keeps lubricant in and contaminants out.
Replacement Parts & Spare Components for the EPR
Beyond complete assemblies, Ever-Power stocks individual replacement parts for the EPR at our Condell Park NSW warehouse. Contact our parts desk with your serial number for compatibility confirmation.
| Component | Material | Stock |
|---|---|---|
| Sun Gear | 20CrMnTi steel, helical | In stock |
| Planet Gear Set (3 pcs) | 20CrMnTi + needle bearings | In stock |
| Planet Carrier | Forged alloy steel | In stock |
| Ring Gear | 42CrMo nitrided steel | In stock |
| Output Bearing Kit | Tapered roller + shims | In stock |
| Input Bearing Kit | Deep-groove ball bearings | In stock |
| Seal Kit | FKM / Viton double-lip | In stock |
| Lubricant Refill | Synthetic gear oil | In stock |
Why Engineers Specify the EPR Gear Reducer
Backlash Control
Backlash grades from ≤ 3 arcmin to ≤ 7 arcmin give engineers flexibility. CNC feeds typically use the reduced grade; optical positioning and semiconductor handling benefit from micro.
Load Capacity and Rigidity
Three simultaneous gear meshes yield higher torque density than single-mesh arrangements. Torsional rigidity of ≥ 7 N·m/arcmin keeps angular deflection under control during rapid accel/decel cycles.
Energy Efficiency
Rated at ≥ 95%, the EPR converts nearly all input power into output torque. Lower heat generation extends lubricant life and bearing intervals, reducing total cost of ownership.
What Our Customers Say
“Needed a compact two-stage 50:1 for a turntable indexer. STEP model accurate to the last chamfer. Lead time three weeks including custom shaft.”
“IP65-rated housing makes washdown maintenance stress-free. No lubricant leaks after 18 months in high humidity. Seal kits affordable from the Sydney warehouse.”
“Blanket order for 60 units/year across three lines. Pricing consistent, delivery reliable. Roughly 35 % savings on landed cost versus European brands.”
Manufacturing Process for the EPR
Every EPR follows a controlled six-step production sequence.
Engineer reviews your servo specs, load profile, and duty cycle to recommend optimal configuration.
Gears hobbed on CNC centres, profile-ground to AGMA Class 11+, surface finish below Ra 0.4 µm.
Carburising and quenching to 58–62 HRC tooth-surface hardness with tough core.
Cleanroom assembly with backlash measured and adjusted to ordered grade.
Run at rated torque/speed; vibration, noise, backlash recorded on individual QC certificate.
Anti-corrosion coating, vacuum-sealed, palletised to Condell Park NSW warehouse.
Why Choose Ever-Power Transmission Australia
Ever-Power Transmission Australia Pty Ltd operates from 27 Harley Crescent, Condell Park NSW 2200, holding local inventory for same-week dispatch. As a gearbox manufacturer with vertically integrated production, we control every variable from steel forging through final assembly.
Our engineering team provides free sizing, STEP/IGES CAD models, and full technical support. Reach us at +61 2 9708 3322 or [email protected].
Frequently Asked Questions
Request a Quotation for the EPR Planetary Gearbox
Send your servo motor model, ratio, and backlash grade. Full technical proposal and landed-cost quotation within 24 hours.
Ever-Power Transmission Australia • 27 Harley Crescent, Condell Park NSW 2200 • +61 2 9708 3322
