{"id":1798,"date":"2026-04-15T07:39:27","date_gmt":"2026-04-15T07:39:27","guid":{"rendered":"https:\/\/worm-reducers.xyz\/?post_type=product&p=1798"},"modified":"2026-04-15T07:39:27","modified_gmt":"2026-04-15T07:39:27","slug":"wpwdk-worm-gearbox-wp-series","status":"publish","type":"product","link":"https:\/\/worm-reducers.xyz\/bs\/proizvod\/wpwdk-worm-gearbox-wp-series\/","title":{"rendered":"WPWDK pu\u017eni mjenja\u010d | WP serija"},"content":{"rendered":"
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WPWDK Series Worm Gear Reducer \u2014 Cast Iron, 6\u20133,025 N\u00b7m, Frame WPWDK40\u2013250<\/h2>\n
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The WPWDK series is a cast iron WP-family pu\u017eni reduktor<\/strong> covering frame sizes WPWDK40 through WPWDK250, with output torque from 6 N\u00b7m (WPWDK40) up to 3,025 N\u00b7m (WPWDK250) at 1,500 rpm standard input speed. At the same power input of 0.12\u201315 kW, the torque range across the series achieves a 504:1 spread \u2014 from light-duty textile machine drives to heavy lifting and metallurgical equipment. The “DK” configuration designation indicates the specific shaft and mounting arrangement in the WP series family, distinct from the WPWO, WPWKO, and WPWT variants in the same family.<\/p>\n

The housing material is HT200 grey cast iron throughout \u2014 the same alloy used across the WP series. HT200 provides the housing rigidity and vibration damping that aluminium alloy cannot match at output torques above 500 N\u00b7m. The self-lubrication properties of graphite-containing grey iron also mean that the housing will not gall or seize if lubrication is temporarily insufficient, providing a degree of operational margin that is not available with die-cast aluminium alloy housings.<\/p>\n

\"Reduktor<\/p>\n

Standard ratios are 10, 15, 20, 25, 30, 40, 50, and 60:1. Bearing options include C&U (domestic), NSK (Japanese), and SKF (European) \u2014 the choice of bearing brand can be specified at the time of order, which is useful when a plant has a standardised bearing supplier or when an OEM needs documentation to match an existing bearing specification. Synthetic lubricant is standard across the series.<\/p>\n<\/div>\n<\/div>\n

\"WPWDK<\/p>\n

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Technical Specifications \u2014 WPWDK Series<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parametar<\/th>\nSpecifikacija<\/th>\n<\/tr>\n<\/thead>\n
Tip<\/td>\nWP series adaptable worm gearbox<\/td>\n<\/tr>\n
Model \/ Frame Sizes<\/td>\nWPWDK40, 50, 60, 70, 80, 100, 120, 135, 155, 175, 200, 250<\/td>\n<\/tr>\n
Materijal ku\u0107i\u0161ta<\/td>\nHT200 grey cast iron<\/td>\n<\/tr>\n
Ulazna snaga<\/td>\n0.12\u201315 kW (at 1,500 rpm input speed)<\/td>\n<\/tr>\n
Output Torque Range (Series)<\/td>\n6\u20133,025 N\u00b7m<\/td>\n<\/tr>\n
Standard Ratios<\/td>\n10, 15, 20, 25, 30, 40, 50, 60<\/td>\n<\/tr>\n
Bearing Options<\/td>\nC&U (domestic) \/ NSK (Japanese) \/ SKF (European) \u2014 specify at order<\/td>\n<\/tr>\n
Seal Options<\/td>\nKSK \/ SKF \u2014 specify at order<\/td>\n<\/tr>\n
Mazivo<\/td>\nSynthetic (specified grade per frame size and duty in product manual)<\/td>\n<\/tr>\n
Boja ku\u0107i\u0161ta<\/td>\nBlue \/ Green or on customer request<\/td>\n<\/tr>\n
Garancija<\/td>\n18 months from shipment<\/td>\n<\/tr>\n
Sistem kvaliteta<\/td>\nISO 9001:2015<\/td>\n<\/tr>\n
Application Sectors<\/td>\nTextile printing and dyeing; rubber and plastics; building materials; lifting machinery; food packaging; metallurgy; environmental protection; petrochemicals; stage machinery; new energy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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WPWDK Configuration \u2014 What the Designation Means<\/h2>\n

The WP series encompasses several different shaft and mounting configurations within the same cast iron housing family. Understanding the configuration suffix helps in selecting the correct variant for a specific machine layout. The primary WP series types that Korea Ever-Power supplies are: WPWO (universal mounting, single output shaft), WPWKO (vertical output shaft), WPWKT (with torque arm), and WPWDK (double keyed shaft \u2014 the DK indicates a shaft end configuration with keyway on both the input and output shafts, optimised for chain sprocket and coupling attachment).<\/p>\n

The WPWDK is commonly specified in textile machinery where the gearbox output shaft drives a sprocket or gear directly via key-and-keyway \u2014 a direct, positive engagement without the need for a coupling hub. The input shaft similarly accepts a sprocket or belt pulley for non-direct motor coupling arrangements, which is the most common power input method in older textile plant designs and in many chemical processing drives where the motor is not co-located with the gearbox.<\/p>\n

The American technology designation in the product description refers to the worm gear geometry and manufacturing process \u2014 cut worm profile with carburised and ground worm shaft \u2014 which follows design principles common in North American industrial gearbox manufacturing. This is contrasted with some lower-cost WP series products that use milled rather than precision-ground worm profiles. The precision-ground worm shaft produces lower mesh noise and longer worm wheel life through better load distribution across the tooth contact.<\/p>\n

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Why Engineers Specify the WPWDK Series<\/h2>\n
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\u2726 6\u20133,025 N\u00b7m in 12 Frame Sizes<\/strong><\/p>\n

The WPWDK40\u2013250 frame series covers a 504:1 torque range from a single product family. A plant running both light tension drives and heavy lifting equipment can standardise on WPWDK and select the appropriate frame size for each drive \u2014 simplifying procurement, maintenance training, and spare parts management.<\/p>\n<\/div>\n

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\u2726 Choice of NSK, SKF or C&U Bearings<\/strong><\/p>\n

Bearing brand specification at order is unusual for this price class of WP gearbox. For OEM builds that must document a specific bearing brand for CE or ATEX certification dossiers, or for plants that standardise on a single bearing supplier for stock management, the WPWDK’s selectable bearing option provides an advantage over series where bearings are supplied as-procured without brand guarantee.<\/p>\n<\/div>\n

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\u2726 HT200 Cast Iron \u2014 Durability Under Sustained Load<\/strong><\/p>\n

HT200 (300 MPa tensile strength, 190\u2013240 HB hardness) provides the housing rigidity to maintain bearing centre distance under continuous radial and axial shaft loads. In textile machinery running multiple shifts per day for years, and in chemical agitator drives running 24\/7, the housing must not creep, fatigue, or corrode in ways that affect gear mesh geometry.<\/p>\n<\/div>\n

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\u2726 Stable Transmission \u2014 Below 50 dB(A)<\/strong><\/p>\n

Textile machinery operates in environments where machine noise accumulates across many drives running simultaneously. The below 50 dB(A) specification for the WPWDK series (consistent with the broader WP series specification) is achieved through the precision-ground worm shaft, matched bronze wheel profile, and the damping mass of the cast iron housing.<\/p>\n<\/div>\n

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\u2726 Large Transmission Ratio in Single Stage<\/strong><\/p>\n

The WPWDK covers 10:1 through 60:1 in a single worm stage. Getting 60:1 reduction in a single compact stage from a 1,500 rpm motor down to 25 rpm output without the cost and complexity of a two-stage helical or helical-bevel gearbox is one of the defining commercial advantages of the worm gear principle in industrial machinery.<\/p>\n<\/div>\n

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\u2726 Samoblokiranje pri omjerima \u2265 20:1<\/strong><\/p>\n

For lifting machinery, gate actuators, and dyeing machine lid drives where the mechanism must hold position when power is removed, the WPWDK at 20:1 and above provides mechanical self-locking without a supplementary brake. At 30:1\u201360:1 the lock is reliable for the normal service temperatures and load levels encountered in these applications.<\/p>\n<\/div>\n<\/div>\n

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Industrije i primjene<\/h2>\n

\u25b8 Lifting Machinery, Metallurgy & Stage Equipment<\/h3>\n

\"WPWDK<\/p>\n

Winch drives, goods hoists, stage rigging systems, and metallurgy transfer equipment in the 0.37\u201311 kW motor power class are common WPWDK applications. The cast iron housing rigidity and the worm gear’s natural self-locking at 20:1 and above provide two layers of load-holding security: mechanical self-lock at the worm mesh, and the mechanical advantage of the worm ratio that limits back-drive torque at the input shaft. For stage machinery applications, the below 50 dB(A) noise specification matters \u2014 quiet operation is a practical requirement in theatre environments where an audible gearbox would affect audience experience during slow scene changes.<\/p>\n

\u25b8 Textile, Printing, Dyeing & Rubber Machinery<\/h3>\n

\"WPWDK<\/p>\n

Textile machinery \u2014 rapier looms, knitting machines, stenter frames \u2014 uses dozens of individual drive points, each typically requiring 0.12\u20132.2 kW at 20\u201360 rpm output. The WPWDK’s key-shaft output and input configuration matches the direct sprocket-drive arrangement common in textile mill installation practice, where motors and gearboxes are individually mounted and connected by short roller chain sections rather than solid-shaft coupled motor-gearbox units. Dyeing machines use similar drive configurations for slow rotation of fabric carriers and chemical agitators.<\/p>\n

\u25b8 Petrochemical, Environmental & New Energy Equipment<\/h3>\n

\"WPWDK<\/p>\n

Chemical processing agitators, environmental machinery fan drives, wastewater treatment paddle drives, and wind power maintenance equipment all benefit from the WPWDK’s combination of high torque range, self-locking safety, and multi-frame availability. Petrochemical drives often require documentation of bearing brand for ATEX equipment packages \u2014 the WPWDK’s ability to specify NSK or SKF bearings allows the gearbox to be included in a certified equipment assembly without bearing brand discrepancies. New energy applications including solar mounting structure adjustment drives and small wind turbine auxiliary equipment are also covered. See the full Raspon pu\u017enih reduktora<\/a> for all available series.<\/p>\n

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Frame Size and Bearing Brand Selection<\/h2>\n

Korea Ever-Power recommends the following selection process for the WPWDK series:<\/p>\n