WPWKO 垂直軸ウォームギア減速機 | 軸下向き出力

Standard WPWO in Vertical Use — The Problem

A standard WPWO ウォームギア減速機 used with the output shaft pointing down places the full weight of the driven mechanism as an axial force on the output bearing — which is rated for radial loads. This reduces bearing life unless an external thrust bearing is added. Additionally, the oil level and vent position in a horizontal housing may not adequately lubricate all bearing surfaces in a vertical orientation.

WPWKO — Designed for Vertical

The WPWKO ウォームギア減速機 housing is designed with the output shaft bearing arrangement, oil sump geometry, and vent plug position optimised for vertical shaft operation. The output bearing sustains the axial load of the driven mechanism within rated limits. No external thrust bearing, adapter, or housing modification is required.

WPWKO worm gear reducer detailed parameter table by frame size

Axial Load Integrated — No Thrust Bearing Needed

The WPWKO output bearing sustains the axial weight of the driven mechanism within rated limits — eliminating the external thrust bearing and support cradle required when a standard WPWO ウォームギア減速機 is used vertically.

Motor Horizontal — Output Vertical

The worm right-angle drive changes the power direction 90° — the motor mounts horizontally on the housing side while the output shaft points down. This is the key space advantage: no vertical motor headroom required above the driven shaft for this ウォームギア減速機.

Self-Locking Holds Vertical Load

At ratios ≥ 20:1, the worm self-locks — output shaft holds the vertical load position when motor power is removed. For goods hoists, platform lifts, and vertical adjustment mechanisms, this ウォームギア減速機 eliminates the supplementary holding brake.

Cast Iron — Rigid Under Sustained Axial Load

HT200 cast iron housing maintains centre distance and bearing alignment under sustained vertical shaft loads throughout service life. Aluminium alloy housings deflect progressively under combined axial and radial loading — the WPWKO cast iron construction of this ウォームギア減速機 avoids this.

Can the WPWKO worm gear reducer be installed shaft-up (output pointing upward)?

Yes. The WPWKO can be mounted with the output shaft pointing upward or downward. Standard is shaft-down; shaft-up is available on request and requires verification that the oil sump level and vent position are appropriate for that specific orientation. Contact Korea Ever-Power with your required mounting position when ordering this ウォームギア減速機.

Can I use a standard WPWO worm gear reducer vertically instead of the WPWKO?

You can install a WPWO vertically but it requires adding an external thrust bearing to handle the axial load from the driven mechanism, and verifying that the oil level and vent are correctly positioned for vertical orientation. The WPWKO eliminates these additional requirements — use it when the output shaft is permanently vertical and the driven load weight acts downward on the shaft. For occasional or temporary vertical use, the WPWO with an appropriate thrust bearing is acceptable.

What is the maximum axial load the WPWKO output shaft can sustain?

The rated axial load capacity varies by frame size. Contact Korea Ever-Power with your specific frame size and axial load for a bearing life confirmation. Provide: frame size, ratio, axial load (N), radial load (N), and duty cycle for a complete assessment. Combined radial and axial loading must both be within the rated envelope of this ウォームギア減速機.

What oil type and change interval is recommended for vertical shaft operation?

ISO VG 220 mineral gear oil for 0–40°C ambient; synthetic ISO VG 220 or VG 320 for higher ambient temperatures. In vertical shaft operation, follow the WPWKO product manual specifically — the oil fill level and vent position differ from the horizontal WPWO. Change at 100 hours (first service), then every 2,000–3,000 hours or 12 months. This ウォームギア減速機 is warranted 18 months from shipment.

Can an IEC motor be mounted directly on the WPWKO worm gear reducer?

Yes. The WPWKO input shaft is horizontal — it accepts standard IEC motor flanges (63B14, 71B14, 80B14, 90B14, and larger depending on frame size) directly. The motor mounts on the side of the housing while the output shaft points downward. This is the standard installation: horizontal motor + vertical shaft-down output from one compact ウォームギア減速機 unit.

Is the self-locking reliable for safety-critical vertical load-hold in this worm gear reducer?

Self-locking at ≥ 20:1 is reliable for static load-hold under normal operating conditions. For safety-critical applications with elevated loads, regulatory compliance typically requires a supplementary certified holding brake regardless of worm gear self-locking — consult applicable machinery safety standards for your region. Self-locking in this ウォームギア減速機 should be considered a useful operational feature, not a primary safety device.

What output coupling type is recommended for vertical shaft drives?

For vertical shaft drives, the coupling must handle both torque and axial weight load. Rigid keyway couplings or shaft-locking assemblies (shrink discs) are standard for direct vertical shaft connections. For driven shafts that must be disconnectable, a jaw coupling with axial thrust capability is preferred. Contact Korea Ever-Power with shaft diameter, transmitted torque, and the vertical load (weight of driven mechanism in Newtons) for a confirmed recommendation.

"WPWKO80 at 30:1 for a warehouse goods hoist. Output shaft down, motor horizontal — fits in the headroom where a vertical motor would not. Self-locking holds the platform at rest between cycles. No brake needed. Running 17 months without issues. The worm gear reducer handles the axial load of the platform directly."

Jung Min-junFacilities Engineer, Incheon Logistics Centre

"Used WPWKO120 for a vertical agitator shaft on a chemical reactor. The vertical output configuration meant we could mount the motor on the side and drop the shaft straight down into the vessel. No bevel stage, no alignment issues. The cast iron worm gear reducer handles the continuous axial load from the agitator weight without any signs of wear after 14 months."

Lee Seo-yeonProcess Engineer, Gyeonggi-do Chemical Plant

"Stage platform lift drive — WPWKO100 at 40:1. Quiet enough for theatre operation, holds position when powered down, compact footprint under the stage floor. The cast iron worm gear reducer handles the vibration from the stage structure much better than the aluminium unit it replaced."

Choi Ha-yeonStage Technical Director, Daejeon Cultural Centre

"WPWKO155 at 25:1 for a large vertical indexing table on our production line. 1,200 N·m output, motor mounted to the side. We ran the previous WPWO with an external thrust bearing for two years — the WPWKO eliminated that bearing entirely, simplified the assembly and reduced installation height by 90 mm. Exactly the worm gear reducer we needed."

Kang Hyun-jaeMachine Design Engineer, Ulsan Automotive Parts OEM

"Used WPWKO70 at 20:1 for a height-adjustable laboratory bench vertical drive. Self-locking holds the bench at the set height when power is off — which is a safety requirement in our specification. The worm gear reducer runs quietly and has been zero-maintenance for 11 months. Dimensions confirmed with Korea Ever-Power drawings before order."

Park Ji-suEquipment Engineer, Seoul Medical Research Institute

"Replaced a bevel gearbox + separate vertical reducer combination with a single WPWKO200. Saved 240 mm total drive length, eliminated one coupling, reduced component count from 4 to 1. The vertical shaft worm gear reducer is now our standard for all new vertical conveyor lift heads. Korea Ever-Power supplied drawings and confirmation within one business day."

Yoo Seong-minSenior Engineer, Incheon Logistics Equipment Manufacturer