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) |
EPR Precision Planetary Gearbox — Product Overview
The EPR is an inline precision planetary gearbox delivering output torque of — with backlash as low as ≤ 3 arcmin. Helical-ground planet gears and a hardened alloy-steel sun gear provide smooth, efficient torque transfer across the full rated speed range. Each unit ships factory-tested under full load, with backlash, vibration, and noise readings recorded on an individual QC certificate.
Manufactured under an ISO 9001-certified quality system, this planetary gearbox is increasingly specified across Australia’s automation, packaging, and machine-tool sectors. Contact us for a same-day engineering recommendation and quotation.
Industry Applications for the EPR Gearbox
Robotics and Motion Control
In robotic joints and end-effector axes, the EPR provides the torsional rigidity needed for path fidelity during high-acceleration moves. Its compact inline form reduces arm inertia, allowing faster cycle times.
Automation and Packaging Lines
The EPR’s wide ratio range lets packaging engineers size the planetary gearbox for automation without extra belt-and-pulley stages. IP65 sealing ensures reliable operation in cold-chain and ambient environments alike.
CNC Machine Tools and Medical Equipment
Ball-screw feeds, grinding-spindle drives, and surgical-robot actuators share a need for vibration-free torque. The EPR’s low-noise helical mesh and tight backlash meet these demanding standards. Precision planetary gearbox custom modifications available on request.
Performance Advantages of the EPR
Ultra-Low Backlash
The EPR ships with backlash from ≤ 3 arcmin (micro) to ≤ 7 arcmin (standard), letting engineers match precision to cost. Multi-axis servo systems maintain repeatability over the full ≥ 20,000 hours service life.
High Torque Density
Output torque of — in a compact housing makes the EPR ideal for space-constrained builds — cobot joints, semiconductor handlers, compact conveyors.
Efficiency ≥ 95%
Each stage operates at ≥ 95% efficiency, compounding into measurable energy savings versus worm gear reducer alternatives that lose 30–50 % of input power as heat.
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 |
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.
What Our Customers Say
“Replaced four ageing gearboxes on our bottling line. Swap took under two hours per unit because mounting dimensions matched. Noise dropped noticeably.”
“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.”
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
