{"id":1668,"date":"2026-07-16T09:10:09","date_gmt":"2026-07-16T09:10:09","guid":{"rendered":"https:\/\/gearrack.top\/product\/cylindrical-worm-wheel-iso-din-line-contact-all-materials\/"},"modified":"2026-07-16T09:10:20","modified_gmt":"2026-07-16T09:10:20","slug":"cylindrical-worm-wheel-iso-din-line-contact-all-materials","status":"publish","type":"product","link":"https:\/\/gearrack.top\/it\/product\/cylindrical-worm-wheel-iso-din-line-contact-all-materials\/","title":{"rendered":"Cylindrical Worm Wheel – ISO\/DIN, Line Contact, All Materials"},"content":{"rendered":"
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<\/p>\n

Product Overview<\/h2>\n
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\n \"Cylindrical\n <\/div>\n
\n

A cylindrical worm wheel<\/strong> is the driven gear in a cylindrical worm and wheel transmission. Two distinct types of cylindrical worm-and-wheel pairs exist in engineering practice: the “worm and helical gear”<\/strong> set, and the “worm and worm wheel”<\/strong> set. Understanding the difference between these two configurations is the foundation for correct worm gear specification, because they differ fundamentally in tooth contact geometry, load capacity, and manufacturing method \u2014 and therefore in the applications each type is suited for. Korea Ever-Power supplies both types, precision-manufactured to customer drawing or standard, in materials from brass and bronze through carbon steel, stainless steel, and alloy steel.<\/p>\n

Korea Ever-Power’s cylindrical worm wheels<\/a> are designed and manufactured using AutoCAD and SolidWorks, with quality control at every stage from raw material to finished inspection. Equipment failures are resolved by email with photos\/videos; damaged parts are replaced free of charge within the warranty period. Customer IPR (design, logo, artwork, tooling) is strictly protected.<\/p>\n<\/p><\/div>\n<\/div>\n

The cylindrical worm is named for the shape of its pitch surface \u2014 a cylinder, as opposed to the globoid (hourglass) worm whose pitch surface is a toroid. The cylindrical worm is by far the most common worm type in industrial production, and the cylindrical worm wheel mated to it is the standard worm gear for industrial drives, machine tools, and conveyors worldwide.<\/p>\n

<\/p>\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Cylindrical Worm Wheel \u2014 Product Specification<\/th>\n<\/tr>\n<\/thead>\n
Material<\/strong><\/td>\nBrass, C45 carbon steel, stainless steel, bronze, cast iron, aluminium alloy, copper, POM, nylon, PA66, MC, PEER, MSM, Delrin<\/td>\n<\/tr>\n
Heat Treatment<\/strong><\/td>\nQuenching & tempering, carburising & quenching, high-frequency hardening, carbonitriding<\/td>\n<\/tr>\n
Surface Treatment<\/strong><\/td>\nCarburising and quenching, tempering, tooth surface high-frequency quench hardening<\/td>\n<\/tr>\n
Bore Type<\/strong><\/td>\nFinished bore, pilot bore, special request<\/td>\n<\/tr>\n
Processing Method<\/strong><\/td>\nMoulding, shaving, hobbing, drilling, tapping, reaming, manual chamfering, grinding<\/td>\n<\/tr>\n
Pressure Angle<\/strong><\/td>\n20\u00b0<\/td>\n<\/tr>\n
Hardness<\/strong><\/td>\n55\u201360 HRC<\/td>\n<\/tr>\n
Standard<\/strong><\/td>\nCustomer drawings, ISO standard<\/td>\n<\/tr>\n
Certificate<\/strong><\/td>\nISO 9001:2008<\/td>\n<\/tr>\n
Confezione<\/strong><\/td>\nWooden case \/ container and pallet, or made-to-order<\/td>\n<\/tr>\n
Software<\/strong><\/td>\nAutoCAD, SolidWorks (design and development)<\/td>\n<\/tr>\n
QC<\/strong><\/td>\nRaw material \u2192 production \u2192 packaging: full-chain quality inspection at each process<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Two Types of Cylindrical Worm and Wheel<\/h2>\n

\"Duplex<\/p>\n

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Type 1 \u2014 Worm and Helical Gear<\/h3>\n

The first type is a special case of crossed-helical (skew) gears: the worm acts as a helical pinion with a very small tooth count (1, 2, or 3 teeth) and a correspondingly large helix angle. The mating helical gear is a standard helical spur gear with a matching helix angle. The calculation method is the same as for crossed-helical (skew) gears, and the standard module selection must be from the normalised set of standard modules. Contact geometry: point contact<\/strong> \u2014 the tooth flanks of the worm and helical gear touch at a single point. This limits the load-carrying capacity significantly: point-contact transmission is suitable only for light loads and low power transmission.<\/p>\n

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Suitable for:<\/strong> Light-load right-angle drives in instruments and consumer electronics where simplicity of manufacture (standard helical gear + standard worm) is more important than load capacity.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

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Type 2 \u2014 Worm and Worm Wheel \u2605<\/h3>\n

The second type \u2014 the true worm and worm wheel \u2014 uses a worm wheel whose teeth are hobbed with a worm mill (hob) that has the same basic features as the worm: same module, same pressure angle, same lead angle. The hobbing process removes material from the worm wheel blank in a manner that produces the exact enveloping tooth form \u2014 curved in the axial direction \u2014 that wraps around the worm thread. Contact geometry: line contact<\/strong> \u2014 the worm and worm wheel tooth flanks touch along a line, not a point. This line contact distributes the tooth force over a much larger area, producing 3\u20135\u00d7 higher load capacity than the worm-and-helical-gear type at the same module and centre distance.<\/p>\n

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Standard for:<\/strong> All industrial worm gear drives \u2014 conveyor reducers, lifting drives, valve actuators, machine tool feeds, and any application requiring genuine torque transmission capacity.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Cylindrical Worm Wheel Lubrication and Arrangement<\/h2>\n

\"Ever-Power<\/p>\n

Correct lubrication of the cylindrical worm wheel drive depends critically on the physical arrangement of the worm and worm wheel \u2014 specifically, whether the worm is below the worm wheel (standard immersion arrangement) or above it (overhead arrangement). The choice of arrangement affects oil flow to the mesh and the selection of the lubrication method:<\/p>\n

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Standard (Worm Below) \u2014 Oil Bath<\/h3>\n

In the standard worm-below arrangement, the worm thread is partially immersed in the oil bath at the bottom of the gearbox. As the worm rotates, the thread carries oil upward into the worm-wheel mesh by the worm’s helical action. Oil level is set so that the bottom of the worm thread is immersed but the worm bearing is not excessively deep in oil (excessive immersion causes churning loss). When the oil immersion depth of the worm bearing has reached the required level but the worm itself is not sufficiently covered, an oil-splashing ring<\/strong> can be installed on the worm shaft to carry additional oil to the mesh and bearings.<\/p>\n<\/p><\/div>\n

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Overhead (Worm Above) \u2014 Forced or Splash<\/h3>\n

When the worm peripheral speed exceeds 10 m\/s, or when the arrangement requires the worm above the worm wheel (overhead type), the worm wheel is immersed in the oil bath instead. The lower-speed worm wheel stirs the oil gently \u2014 low churning loss \u2014 and the oil level is set to immerse the bottom of the worm wheel teeth. The overhead arrangement reduces oil churning loss, reduces the likelihood of abrasive particles from the oil pool entering the mesh (particles settle to the bottom, away from the worm-above mesh), and is preferred for high-speed worm drives.<\/p>\n<\/p><\/div>\n

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Oil Splashing Ring<\/h3>\n

A disk-shaped ring fitted to the worm shaft between the worm and the bearing, whose outer edge dips into the oil bath. As the worm shaft rotates, the ring carries oil from the bath upward to the mesh zone and to the bearing, providing lubrication even when the oil level is set lower than would be needed to immerse the worm directly. The oil splashing ring is the standard solution for worm-below arrangements where the worm bearing oil level and worm thread immersion requirements conflict, and is specified as standard on many cylindrical worm gear gearbox designs.<\/p>\n<\/p><\/div>\n

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Machining Process for the Worm Thread<\/h3>\n

Korea Ever-Power’s cylindrical worm thread machining follows: material preparation \u2192 normalising \u2192 rough turning \u2192 quenching and tempering \u2192 semi-finish turning outer circle \u2192 rough turning spiral surface \u2192 finish turning (fine grinding) inner hole and end face \u2192 keyway \u2192 semi-finish turning spiral surface \u2192 semi-finish grinding outer circle \u2192 semi-finish grinding spiral surface \u2192 grinding centre hole \u2192 fine grinding outer ring \u2192 fine grinding helical surface \u2192 finished product inspection. This multi-stage process sequence, with hardening before final grinding, produces the ground thread surface finish (Ra 0.4\u20130.8 \u00b5m) that maximises worm gear efficiency and minimises worm wheel wear.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Advantages of Korea Ever-Power Cylindrical Worm Wheels<\/h2>\n

\"measuring<\/p>\n

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Environmentally Friendly Raw Materials<\/h3>\n

All raw materials used in Korea Ever-Power cylindrical worm wheel production are environmentally friendly \u2014 compliant with RoHS and REACH requirements. Material certifications are supplied with each batch for customers requiring regulatory documentation.<\/p>\n<\/div>\n

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Skilled Production and Packaging<\/h3>\n

Skilled workers attend to every detail in the production and packaging process \u2014 from worm thread grinding accuracy to the correct application of protective oil paper before packing. Packaging defects that cause transit damage are the most common preventable cause of worm wheel tooth damage at incoming inspection; Korea Ever-Power’s packaging process is designed to prevent this.<\/p>\n<\/div>\n

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Full-Process Quality Inspection<\/h3>\n

A dedicated quality control department inspects the cylindrical worm wheel at each process stage \u2014 incoming material, rough machining, heat treatment, hobbing, grinding, and final inspection. ISO 9001:2008 certified. Inspection records available on request. Failed parts are removed at the earliest stage of detection to avoid adding value to non-conforming material.<\/p>\n<\/div>\n

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IPR Protection<\/h3>\n

Customer intellectual property \u2014 design drawings, brand logos, artwork, tooling, and custom specifications \u2014 is protected under Korea Ever-Power’s strict IPR policy. Custom worm wheel designs are not manufactured for third parties. Tooling produced for a customer’s design remains exclusive to that customer. NDAs are available for sensitive development projects.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Applications<\/h2>\n

\"Ever-Power<\/p>\n

\n
\n
\u26a1<\/div>\n

Electric Machinery and Metallurgy<\/h3>\n

Cylindrical worm wheels in electric motor right-angle drive gearboxes, rolling mill auxiliary drives, and metallurgical handling equipment. High-surface-hardness worm wheels (55\u201360 HRC, carburised and quenched) for the heavy, shock-loaded duty cycles of metallurgical and heavy industrial drives.<\/p>\n<\/div>\n

\n
\ufe0f<\/div>\n

Construction and Road Machinery<\/h3>\n

Cylindrical worm wheels in concrete mixer drum drives, road roller steering drives, and paving machine auger drives. These are outdoor, dirty environments with wide temperature variation \u2014 requiring heat-treated alloy steel worm wheels with corrosion-resistant surface treatment and sealed gearbox arrangements to exclude abrasive particles from the worm mesh.<\/p>\n<\/div>\n

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<\/div>\n

Water Conservancy and Petroleum<\/h3>\n

Cylindrical worm wheels in sluice gate actuators, irrigation pump drives, and oil wellhead valve actuator gearboxes. The self-locking property of the worm gear is critical for sluice and valve actuators \u2014 the gate or valve must hold position without motor power and without a separate brake, even under the full hydraulic pressure load.<\/p>\n<\/div>\n

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<\/div>\n

Food and Light Industrial Machinery<\/h3>\n

Stainless steel or bronze cylindrical worm wheels in food processing conveyor drives, packaging machine right-angle drives, and light industrial right-angle drive units. Stainless steel for washdown food-safe environments; bronze for food-safe oil-bath lubricated drives where the material compatibility with food-grade lubricants is required.<\/p>\n<\/div>\n

\n
\u26cf\ufe0f<\/div>\n

Mining and Transportation Machinery<\/h3>\n

High-strength alloy steel cylindrical worm wheels in mine hoist auxiliary drives, underground conveyor worm gearboxes, and railway level crossing barrier drives. Mining applications require worm wheels capable of handling shock loads and extended service intervals in environments where maintenance access is difficult.<\/p>\n<\/div>\n

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<\/div>\n

Chemical, Rubber, and Cement Machinery<\/h3>\n

Chemical-resistant stainless steel or coated alloy steel cylindrical worm wheels in chemical reactor agitator drives, rubber mixing mill auxiliary drives, and cement plant kiln auxiliary drives. These applications combine high duty cycle, elevated ambient temperature, and chemical or abrasive environment \u2014 requiring the most robust worm wheel material selection and surface treatment to achieve acceptable service life.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Frequently Asked Questions<\/h2>\n
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How do I resolve equipment failure during use?<\/p>\n

Email Korea Ever-Power the problem with photos or videos \u2014 this allows the engineering team to identify the root cause (tooth wear pattern, fracture mode, lubrication condition, or misalignment indication) and provide the correct solution. For damaged worm wheels within the warranty period, Korea Ever-Power will send replacement parts free of charge. Prompt notification with evidence photographs maximises the speed of resolution.<\/p>\n<\/div>\n

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What software does Korea Ever-Power use for cylindrical worm wheel design?<\/p>\n

Korea Ever-Power uses AutoCAD and SolidWorks \u2014 the industry-standard design and development software \u2014 for all cylindrical worm wheel design work. 3D models in SolidWorks allow interference checking, contact pattern simulation, and virtual assembly verification before production begins. Customer drawings in DXF, DWG, STEP, or IGES format are all accepted.<\/p>\n<\/div>\n

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What is the difference between point contact and line contact worm wheel sets, and which should I choose?<\/p>\n

The worm-and-helical-gear set (point contact) is simpler and less expensive to manufacture \u2014 the mating gear is a standard helical gear \u2014 but has much lower load capacity. It is suitable only for light-duty, low-power applications. The true worm-and-worm-wheel set (line contact) has the worm wheel specifically hobbed with a worm-form hob to produce the enveloping tooth profile \u2014 this is the standard for all genuine power transmission applications. For any application involving real torque transmission, specify the worm-and-worm-wheel type. Contact Korea Ever-Power<\/a> with the power, ratio, and centre distance to confirm the correct specification.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Customer Reviews<\/h2>\n
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“We manufacture industrial conveyor right-angle drive gearboxes and source bronze cylindrical worm wheels<\/a> from Korea Ever-Power. The hobbed tooth profile produces confirmed line contact at our incoming contact-pattern test \u2014 the blue marking pattern covers 75% of face width, symmetrically placed. Oil-splashing ring version supplied for our worm-below arrangement; lubrication to the worm bearing confirmed adequate at rated speed. 22 months continuous operation without tooth failure.”<\/p>\n

Kim Min-seok<\/strong>  |  Industrial Gearbox Production Engineer, Incheon Drive Systems Co.  ·  Q2 2026<\/em><\/p>\n<\/div>\n

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“We build sluice gate actuators for irrigation projects. Specified alloy steel cylindrical worm wheels (carburised, HRC 58, ground thread) from Korea Ever-Power. Self-locking under full hydraulic gate load confirmed at our test bench \u2014 zero back-drive rotation recorded. ISO 9001 certificate and material certifications supplied for our government procurement documentation. Delivery: 24 business days bulk.”<\/p>\n

Lee Jeong-won<\/strong>  |  Water Control Actuator Engineer, Gyeonggi Water Systems Co.  ·  Q1 2026<\/em><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Related Products<\/h2>\n
\n
\"Ingranaggio<\/a><\/p>\n
\n

Worm Gears<\/h3>\n

Full worm gear range \u2014 brass, steel, stainless, duplex, customised sets.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n

\"Planetary<\/a><\/p>\n
\n

Planetary Gears<\/h3>\n

Planetary ring gears, internal gear kits, and planetary gear sets.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n

\"Ring<\/a><\/p>\n
\n

Ring Gears<\/h3>\n

Aerospace, wind turbine, automotive, and industrial ring gears.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n

\"Spur<\/a><\/p>\n
\n

Spur Gears<\/h3>\n

Steel, stainless, plastic spur gears \u2014 all modules and materials.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n

\"Helical<\/a><\/p>\n
\n

Helical Gears<\/h3>\n

Industrial helical gears for low-noise parallel shaft drives.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n

\"Ingranaggi<\/a><\/p>\n
\n

Ingranaggi conici<\/h3>\n

Bevel and spiral bevel gears for right-angle output drives.<\/p>\n

Browse \u2192<\/a><\/div>\n<\/div>\n<\/div>\n

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Request a Quotation for Cylindrical Worm Wheels<\/h3>\n

Bronze, alloy steel, stainless steel, brass \u2014 all materials. ISO\/DIN standard or customer drawing. Line-contact worm wheel hobbing as standard. AutoCAD\/SolidWorks drawing formats accepted. ISO 9001 certified.<\/p>\n

Get a Quote Now<\/a>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

One distinguishes two types of cylindrical worm and worm wheel: a set of worm and helical gear (point contact, light duty) and a set of worm and worm wheel (line contact, industrial standard). The true worm and worm wheel set uses a hob with the same geometry as the worm, producing line contact that gives 3\u20135\u00d7 higher load capacity than crossed-helical gears. Materials: brass, C45 carbon steel, stainless steel, bronze, cast iron, aluminium alloy, copper, POM, nylon, PA66, MC, PEER, MSM, Delrin. Heat treatment: quenching and tempering, carburising, high-frequency hardening, carbonitriding. Hardness: 55\u201360 HRC. Pressure angle: 20\u00b0. ISO 9001:2008 certified. AutoCAD and SolidWorks design software. Wooden case or pallet packing.<\/p>","protected":false},"featured_media":1669,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[4562],"product_tag":[],"class_list":["post-1668","product","type-product","status-publish","has-post-thumbnail","product_cat-worm-gear","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product\/1668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/comments?post=1668"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media\/1669"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media?parent=1668"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_brand?post=1668"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_cat?post=1668"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_tag?post=1668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}