Энергосберегающий планетарный редуктор серии EP-BPGA — фланец типа А, для установки на двигатель (EP-BPGA040–EP-BPGA160)

The EP-BPGA series energy-saving planetary gearbox solves a specific installation problem: how to integrate a gear reducer into a machine design without adding a separate mounting base, a shaft coupling, and an alignment procedure to the bill of materials and the assembly process. The A-type input flange of EP-BPGA is designed to mate directly with an IEC standard B5 motor face flange — the gearbox hangs from the motor, the motor shaft inserts directly into the gearbox input bore, and the assembly is complete. No coupling housing, no base plate, no laser alignment.

Internally, EP-BPGA is identical to the EP-BPG series: the same gear train, the same backlash specification (<6 arcmin for frames 080–160, <8 arcmin for frames 040–060), the same gear ratios, and the same energy-saving design that delivers >95% single-stage efficiency. The A-type flange is the only structural difference — it changes how the gearbox mounts, not what it does mechanically. This means all the energy-saving benefits, sealed maintenance-free lubrication, and compact planetary torque density of the EP-BPG series are available in a motor-mounted form factor.

What Changes When You Use A-Type Flange

IEC 60072 (EN 50347) standardises the B5 flange as a circular mounting face on the motor non-drive end or drive end with a defined pilot diameter, bolt-circle diameter, and bolt size for each motor frame size. A gearbox with an A-type input flange is designed to this same B5 geometry — when the gearbox A-flange mates with the motor B5 face, the pilot diameter centres the shaft axes to within 0.1–0.2 mm total indicated runout, and the bolts clamp the faces together. No shimming, no dial gauge measurement, no laser alignment target.

Hoist and Lifting Mechanisms

Overhead hoist mechanisms in Korean manufacturing facilities mount the motor-gearbox-drum assembly in a confined space above the work area. The A-flange motor-hung arrangement of EP-BPGA eliminates the coupling length that would otherwise push the drum further from the hoist chassis structure. Important: add a self-locking worm stage downstream for fail-safe load holding — planetary gearboxes are not self-locking.

Wastewater Aerator and Treatment Drives

Wastewater treatment plant aerators and submerged agitators are installed in accessible locations for maintenance, but alignment in a humid, corrosive environment is particularly challenging. EP-BPGA's flange-defined alignment eliminates the need for precise field alignment at initial installation and after maintenance, reducing the skill and time required for field service by wastewater treatment plant operators — an important consideration for Korean municipal treatment facilities.

Remote and Hard-to-Access Drive Locations

Industrial drives installed at height, in confined spaces, or in locations where a laser alignment tool cannot be set up benefit significantly from EP-BPGA's alignment-free installation. Mining ventilation fans, elevated material handling drives, and rooftop HVAC drives are examples where EP-BPGA's flange-centred self-aligning installation simplifies both initial setup and any future motor replacement requiring gearbox reinstallation. Power split with bevel stages available for multi-output remote drive configurations.

Base-Mounted Gear Reducer (EP-BPG) — Installation Steps

1. 1. 1

      Machine frame receives motor and gearbox as separate components at separate mounting locations.

   2. 2

      Bolt motor to motor base plate, bolt gearbox to gearbox base plate.

   3. 3

      Mount coupling half on motor shaft, mount coupling half on gearbox input shaft.

   4. 4

      Shaft alignment procedure: laser or dial indicator — adjust shims under motor or gearbox feet to bring parallel and angular misalignment within coupling limits. May require multiple iterations.

   5. 5

      Install coupling guard, verify alignment documentation, run-in test.

EP-BPGA A-Flange — Installation Steps

1. 1. 1

      Insert motor shaft into EP-BPGA input bore. Shaft registers in gearbox input bore — self-centring.

   2. 2

      Align A-flange pilot diameter with motor B5 pilot bore. Flanges mate concentrically — no measurement required.

   3. 3

      Torque flange bolts to specification using standard torque wrench. Alignment is complete.

   4. 4

      Mount the motor-gearbox assembly as a single unit to the machine frame. Connect output shaft to load.

• ✔A-flange pilot diameter and bolt-circle verified by CMM — confirmed to IEC B5 standard
• ✔Backlash verified per batch — <6 or <8 arcmin per frame size
• ✔Input bore run-out checked — confirming motor shaft insertion concentricity
• ✔Full-load torque test at rated output per production batch
• ✔Dimensional and material certificate supplied with delivery

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We build 80–120 pump sets per month. Switched from coupling-plus-EP-BPG to EP-BPGA on our standard LS Electric motor lineup. Assembly time per pump set dropped from 2.5 hours to 35 minutes — we measured it. The A-flange simply bolts onto the B5 motor face. The coupling, coupling guard, alignment procedure, and alignment documentation are all gone from the process. In 14 months we have had zero coupling-related warranty calls, which previously averaged two per quarter. The IEC frame compatibility chart Korea Ever-Power provided covered all 6 motor sizes we use without requiring any custom adapters.

EP-BPGA120 at 25:1 on our top-entry reactor agitators — 12 vessels, 2 agitators each. The overhead suspended motor-gearbox assembly is at 4.5 metres height. With our previous coupling arrangement, shaft realignment after any motor replacement required a scaffold platform, two technicians, and half a day. With EP-BPGA, motor replacement takes one technician 40 minutes — bolt off the old motor, bolt on the new motor, done. The flange self-aligns. 22 months of operation across all 24 drives, no gearbox faults, two motor replacements completed without re-alignment procedure.

EP-BPGA080 at 20:1 integrated into a food mixing machine for a Korean bakery equipment OEM. The sealed lubrication and the elimination of the coupling housing meant we could design the drive head without any lubricant-related contamination exclusion zones — important for our food safety certification. The A-flange also let us reduce the drive head housing length by 95 mm, which allowed us to add a third mixing tool position that wouldn't have fit with the coupling arrangement. Product has now been in production for 18 months with no field complaints.

EP-BPGA120 at 30:1 for wastewater aeration blower drives at a municipal treatment plant — 18 units installed in three phases. Installation site has limited access and high humidity. Without the coupling alignment requirement, our installation team completed each drive in under 45 minutes, regardless of conditions. The sealed planetary gearbox handles the humid environment without corrosion issues that the open coupling guards on the previous drives accumulated. One note: provide Korea Ever-Power with your exact motor frame code early — the A-flange bore depends on this and is manufactured to order. We specified IEC132M and received perfect-fit units first time.

QCan EP-BPGA be used with any motor that has a B5 flange, or only specific Korean brands?

Any motor with an IEC 60072 / EN 50347 standard B5 flange is compatible with EP-BPGA, regardless of manufacturer. The B5 pilot diameter and bolt-circle are standardised by the IEC frame number — IEC 80, IEC 90, IEC 100, IEC 112, IEC 132, IEC 160, and so on. Korea Ever-Power maintains compatibility data for Korean brands (LS Electric, Hyundai Electric) and international brands (ABB, Siemens, WEG, Teco). Provide the IEC frame code of your motor to confirm the correct A-flange specification for your EP-BPGA order.

QWhat happens if I need to replace the motor — does the gearbox need to be re-aligned to the new motor?

No — this is one of the most significant maintenance advantages of the A-flange design. When you replace the motor, the new motor's B5 flange mates with the EP-BPGA A-flange in the same way the original motor did. The pilot diameter centres the shafts to IEC tolerance automatically. Unbolt old motor, insert new motor shaft into gearbox bore, torque flange bolts — alignment is complete. There is no shaft alignment procedure to repeat, no laser tool required, and no need for specialist alignment personnel. This makes motor replacement in difficult locations (height, confined space, wet environments) practical for standard maintenance staff.

QIs the motor the sole structural support for the EP-BPGA gearbox — what are the load implications?

In a pure motor-hung installation, the motor end shield and B5 flange carry the weight of the gearbox plus any output shaft radial load. The IEC B5 flange is designed for this purpose — motor manufacturers rate the B5 flange for motor-hung gearbox use within defined weight and torque reaction limits. For larger frames (EP-BPGA120 and EP-BPGA160), particularly at two-stage configurations, confirm with Korea Ever-Power that the motor's B5 flange is rated for the gearbox static weight plus the expected output radial load. In some high-torque two-stage configurations, an additional support bracket at the gearbox output end may be recommended to relieve the motor end shield from excessive bending load.

QCan EP-BPGA be installed with the motor shaft horizontal, vertical, or at any angle?

Yes — EP-BPGA's sealed lubrication is not gravity-dependent, so the assembly can be installed in any orientation: motor above with shaft pointing down (common for top-entry agitators), motor horizontal, or motor below with shaft pointing up (less common). For the motor-vertical-shaft-down orientation (agitator application), confirm with Korea Ever-Power that the sealed lubrication specification for your frame size is confirmed for this orientation — lubricant distribution in the planetary stage varies with mounting orientation and larger frames may have specific recommendations.

QWhat is the difference between ordering EP-BPGA and EP-BPG — is the price different?

EP-BPGA typically carries a small price premium over EP-BPG for the same frame and ratio, reflecting the additional machining required for the A-flange pilot diameter and bolt-circle to IEC B5 tolerances. However, this premium is more than offset by the elimination of: the flexible coupling cost, the coupling housing cost, the base plate cost (in some configurations), and the alignment labour cost. For OEM applications building multiple units, the total installed cost of an EP-BPGA assembly is typically lower than an EP-BPG assembly with coupling, even before accounting for the reduction in warranty claims from coupling-related failures.