Description
EPNRV063 Shaft-Input Aluminium Worm Reducer — Overview
The EPNRV063 is the heavy-duty mid-range model in the EPNRV aluminium worm reducer series, combining 160 Nm of output torque with the shaft-input versatility that makes it the first choice for chemical process engineers driving agitators and mixers from existing line-shaft systems. The absence of a motor flange allows the EPNRV063 to be driven by servo motors with non-standard frame dimensions, hydraulic motors, and variable-frequency drives via flexible coupling — solving the integration challenge engineers face when specifying new speed reduction in brownfield chemical plants and paper mills where standard IEC motor mountings are not always feasible. With 700 N input shaft radial capacity and five output flange options, the EPNRV063 is the most versatile shaft-input reducer in the EPNRV range.
EPNRV063 Technical Specifications
General Specifications
| Parameter | Value |
|---|---|
| Model | EPNRV063 |
| Maximum Output Torque (M2) | 160 Nm |
| Maximum Output Radial Force (Fr2) | 6270 N |
| Maximum Input Shaft Radial Force (Fr1) | 700 N |
| Available Gear Ratios (i) | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Output Shaft Diameter | 28 mm / 1.125 in |
| Input Shaft Diameter | 15.875 mm / 0.625 in |
| Input Type | Open shaft — no motor flange |
| Compatible Input Sources | V-belt pulley, chain sprocket, flexible coupling, line shaft |
| Unit Weight | 6.2 kg |
| Housing Material | Die-cast ADC12 aluminium alloy |
| Worm Wheel Material | High-tensile phosphor bronze |
| Worm Shaft Material | 20CrMnTi alloy steel — case-hardened & ground |
| Surface Finish | Two-coat baked epoxy-polyester |
| Standard Mounting | B3 foot / hollow bore with torque arm |
| Lubrication | ISO VG 220 synthetic gear oil |
| Reference Input Speed (n1) | 1,400 rpm (50 Hz 4-pole reference) |
Inch-Series Dimension Reference
| Dimension | Inch Value | Metric Equivalent |
|---|---|---|
| A – Body width | 4.41 in | 112 mm |
| B – Body height | 4.02 in | 102 mm |
| J – Overall length | 5.75 in | 146 mm |
| Output shaft dia. | 1.125 in | 28.6 mm |
| Input shaft dia. | 0.625 in | 15.9 mm |
| Max input shaft radial load (Fr1) | – | 700 N |
| Max output shaft radial load (Fr2) | – | 6,270 N |
| Weight | – | 6.2 kg |
Performance Data — EPNRV063 (n1 = 1,400 rpm)
| Ratio (i) | n2 (rpm) | P1 (kW) | M2 (Nm) | Fr2 (N) | Fr1 (N) |
|---|---|---|---|---|---|
| 7.5 | 186.7 | 2.8 | 128 | 2359 | 500 |
| 10 | 140 | 2.2 | 130 | 2597 | 571 |
| 15 | 93.3 | 1.6 | 140 | 2973 | 615 |
| 20 | 70 | 1.2 | 135 | 3272 | 667 |
| 25 | 56 | 1.0 | 130 | 3524 | 700 |
| 30 | 46.7 | 1.1 | 160 | 3745 | 700 |
| 40 | 35 | 0.8 | 145 | 4122 | 700 |
| 50 | 28 | 0.6 | 135 | 4440 | 700 |
| 60 | 23.3 | 0.5 | 130 | 4719 | 700 |
| 80 | 17.5 | 0.4 | 122 | 5193 | 700 |
| 100 | 14 | 0.3 | 118 | 5595 | 700 |
Fr2 = maximum radial force on output shaft. Fr1 = maximum radial force on input shaft (belt/chain tension resultant). Ensure both Fr1 and Fr2 values are not exceeded in your application.
EPNRV vs EPNMRV — What Is the Difference?
Both the EPNRV063 and the EPNMRV063 share the same die-cast aluminium housing, worm gear set, output shaft, output flange options, and sealing system. The single difference is at the input end: the EPNMRV063 has an integrated IEC/NEMA motor flange (VS) that attaches directly to a standard electric motor; the EPNRV063 instead has an open input shaft with keyway, accepting V-belt pulleys, chain sprockets, flexible couplings, or any other mechanical drive arrangement. Choose EPNMRV063 when driving from a standard IEC or NEMA motor; choose EPNRV063 when your input source is a belt drive, chain drive, hydraulic motor, servo drive with non-standard frame, or existing line shaft.
| Feature | EPNRV063 | EPNMRV063 |
|---|---|---|
| Input type | Open shaft (belt/chain/coupling) | IEC/NEMA motor flange (VS) |
| Motor frame compatibility | Any — via coupling | IEC/NEMA standard only |
| Hydraulic/servo motor use | Yes — flexible coupling | Only with adaptor plate |
| Retrofit ease into belt drives | High — direct sprocket mount | Requires motor bracket |
| Fr1 specification | Yes — rated 700 N | N/A — load in motor bearing |
| Weight | 6.2 kg | 6.2 kg (identical) |
| Output shaft/flanges | Identical to EPNMRV063 | Identical to EPNRV063 |
Key Features & Benefits — EPNRV063
160 Nm for Chemical Plant Shaft Drives
At 30:1 ratio the EPNRV063 delivers 160 Nm from a 1.1 kW shaft input — adequate for small paddle agitators, dosing pump drives, and filter press actuators in chemical plants driven from existing process plant line shafts or belt-drive transmission systems.
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700 N Fr1 — Heaviest Belt Drive in Class
The 700 N input shaft radial force rating is the highest among comparable 63-frame shaft-input reducers, supporting multi-groove V-belt drives from motors up to 2.8 kW and heavy roller chain drives from process plant line shafts — all without supplementary input shaft support bearings.
Five Output Flange Options (FA–FE)
FA, FB, FC, FD, and FE output flanges provide the broadest connection range in the EPNRV series, covering standard agitator shaft couplings, conveyor sprocket hubs, and European process plant flange standards that no other 63-frame shaft-input reducer offers as standard.
Servo & Hydraulic Motor Compatibility
The shaft-only input accepts flexible jaw couplings, bellows couplings, and Oldham couplings to any rotary drive source. Hydraulic motors, servo drives, and air motors with non-standard frame dimensions all couple easily — the primary reason process plant engineers specify the EPNRV063 over the flanged EPNMRV063.
️
6.2 kg — Overhead Line-Shaft Ready
At 6.2 kg the EPNRV063 is 66% lighter than an equivalent cast-iron unit. This makes it practical to mount multiple units on overhead line-shaft systems where cumulative loading would rule out heavier reducers, and simplifies single-person installation at elevated positions.
Application Scenarios — Where the EPNRV063 Excels
Chemical Plant Belt & Line-Shaft Drives
Agitator belt drives, chemical dosing pump chain drives, and filter press actuators in petrochemical and fine chemical plants use the EPNRV063 connected to existing plant line shafts via roller chain or V-belt — avoiding the need to install new electrical panels and motor starters for each drive point. Keyword: shaft-input worm reducer for chemical plant belt-drive and agitator systems
Water Treatment Infrastructure Chain Drives
Sludge scraper chain drives, flocculation paddle belt drives, and dosing pump line-shaft taps in water treatment plants use the EPNRV063 where existing chain or belt transmission infrastructure makes shaft-input more economical than new motor installations. Keyword: shaft-input worm gearbox for water treatment infrastructure drives
Heavy Industrial Conveyor Belt Drives
Long-run belt conveyors in quarry preparation plants, mineral processing facilities, and port bulk-handling sites use the EPNRV063 as a cost-effective belt-drive speed reducer where no motor-flanging infrastructure exists at the drive point. Keyword: shaft-input worm reducer for heavy industrial conveyor belt drives
Paper Mill & Print Machinery Line Shafts
Paper mill web-tension roller drives, printing press dampener belt drives, and fold-and-pack conveyor chain systems use the EPNRV063 to tap speed reduction from existing plant line shafts — maintaining synchronisation with the main press drive without additional motors. Keyword: shaft-input worm gear reducer for paper mill and printing press drives
Selection Guide & Mounting Reference — EPNRV063
Model Selection Recommendation
Select the EPNRV063 when torque is 118–160 Nm, input is shaft-driven (belt/chain/coupling), and Fr1 ≤ 700 N. For direct IEC motor input use EPNMRV063. For input radial forces above 700 N or torque above 160 Nm, step up to EPNRV075.
Mounting Positions & Lubrication Notes
| Mounting | Code | Oil Fill Note |
|---|---|---|
| Horizontal — foot down | B3 | Standard reference fill volume |
| Horizontal — foot right | B6 | Same as B3 |
| Horizontal — foot left | B7 | Same as B3 |
| Horizontal — foot up | B8 | Same as B3 |
| Vertical — output shaft down | V5 | Increase fill ~20% above B3 |
| Vertical — output shaft up | V6 | Increase fill ~25% above B3 |
EPNRV063 vs EPNMRV063 — Head-to-Head Comparison
| Attribute | EPNRV063 | EPNMRV063 | Notes |
|---|---|---|---|
| Motor flange | None — shaft input | Integrated IEC/NEMA flange | Hydraulic/servo/line-shaft compatible |
| Fr1 (input radial) | Up to 700 N — highest in 63 class | N/A | Supports heaviest belt drives |
| Output flange options | FA, FB, FC, FD, FE — 5 types | FA, FB, FC, FD, FE — same | Identical output versatility |
| Retrofit ease | High — no new motor bracket | Requires bracket modification | Lower brownfield installation cost |
| Weight | 6.2 kg | 6.2 kg (same housing) | Identical — only input differs |
Frequently Asked Questions — EPNRV063
What is the maximum output torque of the EPNRV063?
160 Nm at 30:1 ratio with n1 = 1,400 rpm input. This is slightly below the EPNMRV063’s 167 Nm because the NRV performance table uses M2 values measured with shaft input at 1,400 rpm — the 5 Nm difference is not significant in practice.
What is the Fr1 input shaft radial force rating for the EPNRV063?
700 N at ratios 25:1 and above. This is the highest Fr1 rating in the EPNRV series at 63 frame size. It supports multi-groove V-belt drives from motors up to 2.8 kW and heavy single-strand roller chain drives from process plant line shafts.
Can the EPNRV063 be driven by a hydraulic motor?
Yes. Connect a flexible jaw or bellows coupling between the hydraulic motor output shaft and the EPNRV063 input shaft (15.875 mm / 0.625 in). Ensure the coupling is sized for the maximum hydraulic motor torque. The EPNRV063 input shaft keyway and retaining thread accept standard coupling hubs without custom machining.
What servo motor coupling types are compatible?
Flexible jaw couplings (Spider), bellows couplings, and Oldham couplings in standard sizes with a 15.875 mm (0.625 in) bore are all compatible. For high-precision servo applications, a zero-backlash bellows coupling is recommended to prevent angular error accumulation at the EPNRV063’s worm gear mesh.
Is the EPNRV063 suitable for paper mill line-shaft installations?
Yes. The shaft input allows the EPNRV063 to tap into existing paper mill line shafts via chain or belt without new electrical installation. The sealed housing resists paper dust and ink mist ingress. Multiple units can be driven from a single line shaft by independently adjusting each unit’s sprocket ratio.
What are the five output flange options (FA–FE)?
FA (standard bolt-circle), FB (extended bolt-circle), FC (large face), FD, and FE. The FE flange is unique to the 63 frame and covers specific European agitator shaft coupling standards. Refer to the EPNRV063 dimensional drawing for PCD and hole specifications for each variant.
What oil fill volume is required for the EPNRV063?
Approximately 0.55 litres of ISO VG 220 synthetic gear oil for horizontal B3 mounting. V5/V6 vertical orientations require 0.65–0.70 litres. In continuous chemical plant agitation duty, replace oil every 5,000 hours or two years, and inspect seals at each oil change.
Customer Reviews — EPNRV063
★★★★★
“We specified the EPNRV063 for our ammonium nitrate dosing agitator belt drives at our Kooragang Island facility. The shaft-input design allowed us to tap drive from the existing plant line shaft without installing new motors and MCC panels. After 2 years in the chemical atmosphere, the epoxy housing shows no corrosion.”
Dosing agitator belt-drive, Kooragang Island NSW chemical plant
Mark S.
Orica Australia Pty Ltd — Australia
★★★★★
“We drive the EPNRV063 from our paper machine line shaft via roller chain for our web-tension roller drives. The shaft input is essential because our line shaft maintains precise synchronisation with the paper machine speed — a motor-flanged unit with its own VFD would introduce speed variation we cannot accept.”
Web-tension roller drive, paper machine line shaft, Hallstavik mill
Jens H.
Papierfabrik Holmen AB — Sweden
★★★★☆
“Using the EPNRV063 on our clarifier sludge scraper chain drives at our Los Vilos water treatment plant. The shaft-input means we retained the existing chain drive infrastructure and simply replaced the old worn-out reducers. Installation took 4 hours per unit versus 2 days for the motor-flange replacements we initially considered.”
Clarifier sludge scraper chain-drive, Los Vilos water treatment plant
Ricardo F.
Aguas del Valle S.A. — Chile
Related Products & Compatible Accessories
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EPNMRV063 — Motor-Flange Version
The EPNMRV063 is the motor-flange counterpart of the EPNRV063, sharing the same housing, worm gear, and output options but adding an IEC/NEMA VS motor flange for direct motor attachment. Choose EPNMRV063 when your drive source is a standard IEC or NEMA motor.
V-Belt Pulleys & Chain Sprockets
Standard stock-bore V-belt pulleys and ISO roller chain sprockets for the EPNRV063 input shaft (15.875 mm / 0.625 in) are available from Ever-power. Verify the resultant belt or chain radial force does not exceed Fr1 = 700 N.
Flexible Couplings for Servo & Hydraulic Motors
Flexible jaw (Spider), bellows, and Oldham couplings in 15.875 mm / 0.625 in bore are available for connecting servo motors, hydraulic motors, and stepper motors to the EPNRV063 input shaft without motor-flange machining.
Output Flanges (FA / FB / FC / FD)
Multiple output flange options for the EPNRV063 allow direct face-mounting to conveyor roller frames, agitator shaft hubs, and indexed disc assemblies. Hollow bore with torque arm also available.
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Torque Arms & Backstop Assemblies
Torque arm brackets for hollow-bore shaft mounting and mechanical backstops to prevent reverse rotation on inclined drives are available as factory-fitted or separately supplied accessories.
Shaft-Input Versatility for Chemical Plant, Paper Mill & Process Industry
The EPNRV063 is the engineer’s choice when hydraulic motors, servo drives, or existing line shafts are the input source. Contact Ever-power for Fr1 calculation support, coupling recommendations, or volume supply pricing.
