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WPWKT — Torque Arm Shaft-Mounted Worm Gear Reducer

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KT
Torque Arm Config

17–3,000 นิวตันเมตร
แรงบิดเอาต์พุต

40–250
ขนาดกรอบ

0.12–15 กิโลวัตต์
กำลังไฟฟ้าขาเข้า

🕳 Hollow Bore Shaft Mount

เดอะ เกียร์ทดรอบแบบหนอน hollow bore output shaft slides directly over the driven machine shaft — like a conveyor drive shaft or mixer shaft. A keyway transmits torque. No separate coupling, no coupling alignment, no coupling maintenance.

🦾 Torque Arm Housing Restraint

When the hollow bore is on the machine shaft, the gearbox housing would rotate freely if not restrained. The KT torque arm is a rigid link between the gearbox housing and a fixed structure (machine frame or wall) — it absorbs the reaction torque and holds the housing stationary.

📉 What Is Eliminated

Compared to a conventional foot-mounted เกียร์ทดรอบแบบหนอน: no separate reducer baseplate, no shaft coupling between reducer and machine, no coupling alignment procedure. The drive train from motor to driven shaft becomes shorter and stiffer.

 

No Shaft Coupling — No Alignment

The hollow bore of this เกียร์ทดรอบแบบหนอน slides directly onto the driven shaft — eliminating the shaft coupling between reducer and machine. No coupling to align, no coupling to replace, no coupling angular error contributing to shaft vibration.

No Separate Baseplate

A foot-mounted เกียร์ทดรอบแบบหนอน requires a fabricated baseplate, positioning, and alignment to the driven machine. The WPWKT replaces the baseplate with a simple torque arm attached to the nearest fixed structure — significantly reducing fabrication and installation time.

Self-Locking Load Hold at ≥ 20:1

The worm gear design of this เกียร์ทดรอบแบบหนอน is inherently self-locking at ratios from 20:1 upward — the driven shaft holds position when the motor stops. Useful for hoist, conveyor, and elevator applications where the load must stay put between operational cycles.

Compact Drive Train Length

Shaft-mounted installation removes one coupling element from the motor-to-machine drive train — the total length from motor shaft to driven shaft is shorter than a conventional foot-mounted arrangement using the same เกียร์ทดรอบแบบหนอน. Valuable in confined machine layouts.

Cast Iron — Wide Torque Range

HT200 cast iron housing across all 12 WPWKT frame sizes. The 17–3,000 N·m torque range covers light conveyor head drives (WPWKT40) through heavy bulk material handling drives (WPWKT250) in the same product family.

Low Noise — Below 50 dB(A)

Worm gear mesh produces lower noise than helical or spur stages at equivalent reduction ratios. The cast iron housing provides additional damping. WPWKT noise level below 50 dB(A) is consistent with indoor food processing and textile environments.

What material and length is the WPWKT torque arm?

The torque arm is a structural steel link — material and length vary by frame size. It is designed to sustain the full reaction torque of the เกียร์ทดรอบแบบหนอน at rated load without deflection that would stress the gearbox housing. Bolt pattern at the fixed end matches standard structural steel bolt spacings. Dimensional drawings are available for all frame sizes on request — confirm the available attachment point distance on your machine frame when specifying WPWKT.

How do I size the hollow bore diameter for my driven shaft?

The WPWKT hollow bore diameter is specified per frame size and corresponds to standard driven shaft diameters for that torque range. Provide your driven shaft diameter, keyway dimensions, and material when ordering. If your shaft diameter is non-standard, contact Korea Ever-Power — bore diameters can be matched to specific shaft sizes within the structural limits of each frame. Over-boring reduces the wall thickness of the hollow bore hub and is not permitted beyond the maximum bore listed for each frame.

Can the WPWKT worm gear reducer be used with a standard IEC motor?

Yes. The WPWKT input shaft accepts a standard shaft coupling connecting to the motor output shaft, or an IEC flange adapter for direct motor flange mounting. The input shaft configuration (solid shaft keyed) is standard across all WPWKT frames. For coupling selection, provide motor shaft diameter, motor frame size, and transmitted torque when contacting Korea Ever-Power.

What is the difference between WPWKT and WPWKO?

WPWKT = torque arm, shaft-mounted. The output is a hollow bore that mounts onto the driven shaft; the torque arm holds the housing. WPWKO = vertical output shaft. The output shaft is solid and points vertically down (or up); the housing is foot-mounted. Both are WP-series เกียร์ทดรอบแบบหนอน but for fundamentally different installation scenarios — WPWKT is for shaft-mounting onto the machine shaft; WPWKO is for where the driven shaft must run vertically.

Is the self-locking of the WPWKT worm gear reducer reliable for hoist load-hold?

Self-locking at ≥ 20:1 is reliable for static load-hold at normal operating temperatures. For hoist applications with safety implications, regulatory standards in most jurisdictions require a separate certified mechanical brake regardless of gearbox self-locking characteristics. Use the self-locking of this เกียร์ทดรอบแบบหนอน as an operational convenience (the load stays put when the motor stops between cycles) rather than as a primary safety device.

Can the torque arm accommodate different attachment point distances?

The standard WPWKT torque arm is a fixed-length structural link. If the distance between the gearbox housing mount and the fixed attachment point on your machine frame is non-standard, a custom-length torque arm can be supplied. Contact Korea Ever-Power with the required attachment point distance (centre of gearbox housing to nearest fixed structure) and the rated torque for a confirmed specification.

What is the recommended oil change interval for the WPWKT?

Change oil at 100 hours (first service — run-in flush). Then every 2,000–3,000 hours or 12 months in continuous industrial service. Fill grade: ISO VG 220 mineral gear oil for 0–40°C ambient; synthetic VG 220 or VG 320 for higher ambient temperatures. The warranty on this เกียร์ทดรอบแบบหนอน is 18 months from shipment under normal operating conditions.

"WPWKT100 at 30:1 for a bulk grain conveyor head drive. Hollow bore onto the 60 mm head shaft, torque arm to the conveyor frame. Eliminated a fabricated reducer support bracket and a shaft coupling. Installation time went from 4 hours to 90 minutes per conveyor head. The worm gear reducer self-locks between cycle starts — grain stays put without a brake."

Oh Seung-junInstallation Engineer, Gyeongnam Grain Handling Equipment Co.

"Used WPWKT80 for a food processing belt conveyor head shaft. No baseplate — torque arm bolts to the existing machine frame. Clean installation, no alignment procedure needed. The worm gear reducer has been running two shifts in a 30°C food plant environment for 16 months with no oil leaks and no issues."

Kim Ji-yeonProduction Engineer, Incheon Food Processing Equipment OEM

"We switched from foot-mounted WPWO to WPWKT on a packaging line upgrade. The reduction in drive train length freed up 180 mm per head position — which let us add an additional packaging station within the original line length. The shaft-mounted worm gear reducer is now standard on all our new conveyor designs."

Park Hyun-taeDesign Engineer, Busan Packaging Machinery Co.

"WPWKT155 at 20:1 on a screw conveyor in a cement plant. Dusty environment, vibration from adjacent equipment. The cast iron housing is holding up well — no deflection issues with the torque arm after 13 months. This worm gear reducer configuration is far better than our previous foot-mounted arrangement which required quarterly re-alignment."

Yun Dae-hoMaintenance Manager, Gyeonggi-do Cement Plant

"Feed screw drive in a poultry facility — WPWKT70 at 25:1. Shaft-mounted onto the screw shaft, torque arm to the hopper frame. Self-locking prevents screw drift when motor off between feed cycles. Easy to access for oil changes because the gearbox is directly on the shaft with nothing underneath it."

Jung Hyo-wonFarm Equipment Engineer, Chungnam Agricultural Machinery Co.

"Korea Ever-Power supplied dimensional drawings and confirmed the hollow bore size to suit our 65 mm conveyor head shaft within 24 hours of enquiry. The WPWKT worm gear reducer arrived correctly dimensioned and was installed in 2 hours. Pricing was 38% below the previous supplier for equivalent specification. Will be ordering again for our next line expansion."

Cho Sung-binProcurement Manager, Seoul Logistics Equipment Manufacturer

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