{"id":1521,"date":"2026-07-14T05:54:01","date_gmt":"2026-07-14T05:54:01","guid":{"rendered":"https:\/\/gearrack.top\/product\/industrial-alloy-steel-double-helical-gears-custom-oem\/"},"modified":"2026-07-14T05:54:32","modified_gmt":"2026-07-14T05:54:32","slug":"industrial-alloy-steel-double-helical-gears-custom-oem","status":"publish","type":"product","link":"https:\/\/gearrack.top\/ko\/product\/industrial-alloy-steel-double-helical-gears-custom-oem\/","title":{"rendered":"Industrial Alloy Steel Double Helical Gears – Custom OEM"},"content":{"rendered":"
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<\/p>\n

Product Overview<\/h2>\n
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\n \"Industrial\n <\/div>\n
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Industrial alloy steel double helical gears<\/strong> bring the performance benefits of the herringbone tooth form \u2014 high contact ratio, minimal axial load on shaft bearings, increased load-carrying capacity, and stable operation \u2014 to custom-configured alloy steel drives across the full range of industrial power transmission applications. The round double helical blank form is standard; material grade is fully customisable per the customer’s drawing or specification.<\/p>\n

Korea Ever-Power accepts minimum order quantity of 1 piece \u2014 a single custom double helical gear<\/a> can be ordered for prototype validation, maintenance replacement, or low-volume OEM programmes where stocking multiples is not practical. The factory has been a recognised manufacturer and supplier of double helical gears for over ten years, offering customised production at competitive pricing with wholesale service available for distributors and OEM buyers.<\/p>\n<\/p><\/div>\n<\/div>\n

Double helical gear processing is more complicated than spur or single helical gear processing, and can be performed by the generative method (gear hobbing) or by form milling, selected per the specific configuration. Hobbing produces higher accuracy but is limited to configurations where the central groove is wide enough for the cutter to exit; milling is used for tight-groove herringbone configurations where hobbing cannot clear. Korea Ever-Power selects the manufacturing method based on the drawing geometry at the enquiry stage.<\/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
Industrial Alloy Steel Double Helical Gear \u2014 Specifications<\/th>\n<\/tr>\n<\/thead>\n
Gear Type<\/strong><\/td>\nDouble Helical (herringbone)<\/td>\n<\/tr>\n
Usage \/ Application<\/strong><\/td>\nIndustrial \u2014 power transmission, speed reduction, direction reversal<\/td>\n<\/tr>\n
Tooth Form<\/strong><\/td>\nDouble helical \u2014 two opposite-hand helical tooth sets on common blank<\/td>\n<\/tr>\n
\uc7ac\ub8cc<\/strong><\/td>\nAlloy steel \u2014 grade customised per drawing or specification<\/td>\n<\/tr>\n
Shape<\/strong><\/td>\nRound \u2014 standard blank form<\/td>\n<\/tr>\n
Minimum Order Quantity<\/strong><\/td>\n1 piece<\/td>\n<\/tr>\n
Manufacturing Method<\/strong><\/td>\nGear hobbing (generative) or gear milling (form), selected per configuration<\/td>\n<\/tr>\n
Center Plane Control<\/strong><\/td>\nAssembly position error of center plane controlled within allowable tolerance<\/td>\n<\/tr>\n
Customisation<\/strong><\/td>\nModule, tooth count, helix angle, bore, hub, material, heat treatment \u2014 all per drawing<\/td>\n<\/tr>\n
Payment Terms<\/strong><\/td>\nT\/T \u2014 50% advance, 50% against photos of finished goods before delivery<\/td>\n<\/tr>\n
Sample Policy<\/strong><\/td>\nSample cost charged upfront; partial cost returned on production order placement<\/td>\n<\/tr>\n
Wholesale<\/strong><\/td>\nWholesale service available for distributors and OEM buyers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Processing and Assembly of Double Helical Gears<\/h2>\n

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

Industrial alloy steel double helical gears present specific manufacturing and assembly considerations that distinguish them from single helical and spur gears. Understanding these requirements is essential for correct specification and reliable service.<\/p>\n

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The Center Plane of the Double Helical Gear<\/strong><\/p>\n

The intersection of the left and right helical tooth directions of a double helical gear forms a family of planes. The symmetrical plane to the gear’s end face \u2014 perpendicular to the gear axis and passing through the mid-point of the tooth width \u2014 is called the center plane of the double helical gear. This center plane is the critical datum for assembly: when a double helical gear meshes with its mating gear, the center planes of both gears must be aligned within the assembly’s allowable position error range. Misalignment of the center planes \u2014 even when individual tooth profiles are correct \u2014 causes unequal load sharing between the left and right helical halves, producing a net residual axial load that negates the herringbone form’s thrust-cancellation advantage.<\/p>\n<\/div>\n

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Shaft Positioning During Assembly<\/strong><\/p>\n

Restricted by the structure of the reducer and to meet the conditions of standard meshing transmission, the double helical gear shaft must be correctly positioned during assembly. Unlike a spur gear, which is insensitive to small axial position errors within the face width range, a double helical gear’s center plane alignment depends on the axial position of the gear on the shaft. Assembly procedures must control the axial position of the gear on its shaft to the tolerance specified on the drawing \u2014 typically tighter than the axial running clearance of the bearing arrangement.<\/p>\n<\/div>\n

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High Coincidence and Stable Operation<\/strong><\/p>\n

When correctly manufactured and assembled, industrial alloy steel double helical gears deliver high coincidence (contact ratio), small residual axial load, increased carrying capacity, and stable operation compared with spur gears of equal pitch diameter. The high contact ratio means multiple tooth pairs on both halves share load simultaneously, reducing peak contact stress and tooth bending stress. The carrying capacity per unit of centre distance is greater than for any other external parallel-shaft gear type at equivalent accuracy grade.<\/p>\n<\/div>\n

<\/p>\n

Key Advantages<\/h2>\n

\"measuring<\/p>\n

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High Coincidence Degree<\/h3>\n

The total contact ratio of a double helical gear pair is the sum of the transverse contact ratio and the overlap contact ratio from both helical halves. This is typically 2\u20134\u00d7 the contact ratio of an equivalent spur gear, meaning load is distributed across more tooth pairs simultaneously \u2014 reducing noise, vibration, and peak tooth stress.<\/p>\n<\/p><\/div>\n

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Small Axial Load<\/h3>\n

When correctly assembled with center planes aligned, the axial thrust from the left and right helical halves cancel \u2014 the net axial load on the shaft bearings is zero (or very small, residual misalignment component only). This eliminates the need for thrust bearings and reduces housing stress at axial load contact points.<\/p>\n<\/p><\/div>\n

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Increased Carrying Capacity<\/h3>\n

Load is shared across two tooth sets (effectively doubling the available face width for load sharing). At the same pitch diameter and centre distance as a single helical gear, a double helical gear can carry significantly more torque before reaching the tooth surface fatigue limit.<\/p>\n<\/p><\/div>\n

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Stable Operation<\/h3>\n

The progressive tooth engagement of helical teeth, combined with the high contact ratio and zero-thrust operation, produces steady, low-vibration torque transmission even at high speed. Industrial alloy steel double helical gears running in well-lubricated enclosed gearboxes typically have lower operating noise than any other external gear configuration at the same power level.<\/p>\n<\/p><\/div>\n

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MOQ of 1 \u2014 Maximum Flexibility<\/h3>\n

The minimum order quantity of 1 piece makes Korea Ever-Power’s industrial alloy steel double helical gear service accessible to prototype programmes, single-unit maintenance replacements, and low-volume OEM products where ordering in quantity is not practical. Each single-piece order receives the same material and dimensional verification as a production batch.<\/p>\n<\/p><\/div>\n

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Full Custom Material Selection<\/h3>\n

Any alloy steel grade can be specified \u2014 from standard 45# carbon steel through high-alloy grades like 40CrNiMoA and 18CrNiMo6. The material is specified by the customer’s drawing, and Korea Ever-Power sources the material to the specified grade and provides a material certificate with each delivery.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

\uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8<\/h2>\n

\"types<\/p>\n

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<\/div>\n

Industrial Reduction Gearboxes<\/h3>\n

Custom-configured alloy steel double helical gears for industrial speed reducers in conveyors, mixers, extruders, and compressors. The combination of high contact ratio and zero axial thrust makes these gears the highest-performance option for enclosed industrial gearboxes.<\/p>\n<\/p><\/div>\n

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Prototype and R&D Programmes<\/h3>\n

Single-piece (MOQ 1) custom alloy steel double helical gears for prototype gearboxes and engineering research programmes. No minimum quantity commitment means prototype gear sets can be ordered and evaluated before production tooling is committed.<\/p>\n<\/p><\/div>\n

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\ufe0f<\/div>\n

Heavy Machinery Maintenance<\/h3>\n

Single-unit replacement gears for failed industrial alloy steel double helical gears in cranes, mining equipment, and heavy conveyors \u2014 where OEM spares are unavailable, discontinued, or priced prohibitively. MOQ 1 makes economical single-unit replacement possible without stocking multiples.<\/p>\n<\/p><\/div>\n

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\u2693<\/div>\n

Marine and Offshore<\/h3>\n

Alloy steel herringbone gears for marine reduction gearboxes, deck machinery, and offshore lifting equipment where custom material specification, MOQ 1, and competitive pricing for single-vessel build quantities are all simultaneously required.<\/p>\n<\/p><\/div>\n

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\u2699\ufe0f<\/div>\n

Custom OEM Products<\/h3>\n

Low-to-medium volume OEM production of industrial alloy steel double helical gears for specialised machine builders where quantities per programme are too low for in-house tooling justification but too high to source individually from standard stock.<\/p>\n<\/p><\/div>\n

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<\/div>\n

Wholesale Distribution<\/h3>\n

Wholesale supply of customised industrial alloy steel double helical gears to distributors and gear traders who supply the maintenance and MRO market in Europe, Southeast Asia, North America, and the Middle East.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Frequently Asked Questions<\/h2>\n
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Can you send the relevant technical parameters for industrial alloy steel double helical gears?<\/p>\n

Yes \u2014 contact Korea Ever-Power online or by email with the specific configuration you need. For standard industrial alloy steel double helical gear enquiries, provide the module, tooth count, helix angle, bore diameter, face width, material grade, and required accuracy grade. We will return the relevant technical parameters, manufacturing lead time, and price. For customers who have a drawing, send it directly \u2014 this is the fastest path to a complete technical and commercial response.<\/p>\n<\/div>\n

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Can product parameters be modified based on our specific data?<\/p>\n

Yes \u2014 most products can be modified based on customer data. Contact us and provide the parameters you need. The only constraints are the manufacturing machine capacities (maximum OD, maximum face width, maximum module per the machine limits) and the physical feasibility of the specific geometry. For modifications to standard configurations, provide the changed parameters and we will confirm feasibility and any impact on price and lead time before committing to production.<\/p>\n<\/div>\n

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How are sample and express charges handled?<\/p>\n

For express charges, payment can be made directly to our company account, or customers with express account history can arrange freight-collect. If customers need samples, the sample cost is charged first. Once the customer places a production order following sample confirmation, a part of the sample cost is returned to the customer’s account. This policy ensures both sides are committed to the evaluation process.<\/p>\n<\/div>\n

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What ideas or custom requirements can Korea Ever-Power help with?<\/p>\n

Send us your ideas or requirements \u2014 even in conceptual form without a finished drawing. Our engineering team can help define the gear geometry from the application requirement, produce a drawing for your confirmation, and then manufacture to the confirmed drawing. This covers new gear designs, replacement gears for obsolete equipment, and modified versions of existing designs. If a customer has an idea but is unsure whether it is feasible, the fastest approach is to describe the requirement by email and we will assess feasibility and respond with a preliminary recommendation.<\/p>\n<\/div>\n

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What are the payment terms for industrial alloy steel double helical gears?<\/p>\n

Payment is by T\/T (telegraphic transfer). For regular orders, the standard terms are 50% in advance and 50% against photos of the finished goods before delivery. The pre-shipment photos allow the customer to visually verify the completed gear before the balance is transferred \u2014 a practical quality assurance step that is particularly useful for new customers or unusual configurations. Contact our team<\/a> with your drawing and required quantity for a quotation and confirmed payment schedule.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Customer Reviews<\/h2>\n
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“We needed a single replacement 42CrMo double helical gear for a failed unit in a legacy industrial reducer \u2014 OEM discontinued. Korea Ever-Power accepted MOQ 1, produced from our measurement report of the failed gear, and sent pre-shipment photos before we paid the balance. Gear fitted correctly at first installation. The center plane alignment was confirmed within our assembly specification during installation.”<\/p>\n

Kim Dong-jun<\/strong>  |  Plant Maintenance Engineer, Incheon Industrial Machinery  ·  Q2 2026<\/em><\/p>\n<\/div>\n

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“We are a gear distributor supplying the MRO market. Korea Ever-Power’s industrial alloy steel double helical gears<\/a> at MOQ 1 allow us to fulfil single-unit emergency replacement orders that we previously could not service. The 50\/50 T\/T payment with pre-shipment photos provides the verification our customers require before we release payment. We have placed over 20 single-unit orders across various alloy grades in the past 12 months.”<\/p>\n

Lee Min-cheol<\/strong>  |  Technical Sales Manager, Busan Gear Distribution Co.  ·  Q4 2025<\/em><\/p>\n<\/div>\n

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“We ordered a prototype 40CrNiMoA double helical gear set for an R&D gearbox \u2014 2 pieces total. Korea Ever-Power accepted the order at MOQ 1 per piece and helped us finalise the helix angle selection for our target contact ratio. The center plane alignment tolerance was specified on the drawing and confirmed in the dimensional inspection report.”<\/p>\n

Park Seong-ho<\/strong>  |  Drivetrain R&D Engineer, Gyeonggi Mechanical Research Institute  ·  Q1 2026<\/em><\/p>\n<\/div>\n

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“We build specialist marine lifting equipment with low annual unit volumes \u2014 typically 3\u20135 gearboxes per year. The MOQ 1 policy from Korea Ever-Power means we can order gear sets per project without stocking excess. The sample cost refund on production order placement has been applied correctly on our first two production follow-on orders.”<\/p>\n

Choi Jun-seo<\/strong>  |  Marine Equipment Design Lead, Ulsan Marine Lifting Systems  ·  Q3 2025<\/em><\/p>\n<\/div>\n

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“We needed an alloy steel double helical gear for a wholesale customer’s obsolete conveyor gearbox \u2014 unusual module 7, custom helix angle. Korea Ever-Power confirmed they had the required pitch cutter and produced from our measurement drawing. Pre-shipment photo confirmed the gear matched the drawing dimensions. Delivered within the quoted lead time.”<\/p>\n

Yoon Byeong-su<\/strong>  |  Wholesale Procurement Lead, Daejeon Industrial Components Distribution  ·  Q2 2025<\/em><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Related Products<\/h2>\n
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\n \"Double
\n <\/a><\/p>\n
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Helical Gears<\/h3>\n

Korea Ever-Power’s full helical gear range covers industrial alloy steel double helical gears, heavy machinery gears, rolling mill gears, mining carburised gears, and ground precision gears \u2014 all at MOQ 1 for custom configurations.<\/p>\n

Browse Helical Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n

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\n \"\uc0b0\uc5c5\uc6a9
\n <\/a><\/p>\n
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\ubca0\ubca8 \uae30\uc5b4<\/h3>\n

Industrial alloy steel bevel gears for right-angle direction changes \u2014 the intersecting-shaft complement to double helical parallel-axis gears. Also at MOQ 1 for custom single-unit production.<\/p>\n

Browse Bevel Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n<\/div>\n

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Request a Quotation \u2014 MOQ 1 Accepted<\/h3>\n

Send drawing, measurement report, or describe your requirement. Any alloy steel grade. Module and helix angle custom to drawing. T\/T 50\/50; pre-shipment photos included. Sample cost partially refunded on production order.<\/p>\n

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

Korea Ever-Power industrial alloy steel double helical gears are manufactured in customised alloy steel grades to customer specification. Round double helical (herringbone) tooth form. MOQ 1 piece \u2014 single-unit custom production accepted. High coincidence degree, small axial load, increased carrying capacity, and stable operation are the defining performance advantages of the double helical tooth form. Processing by generative hobbing or by milling, selected per configuration. Center plane symmetry and assembly position accuracy controlled within the specified allowable tolerance range. T\/T payment; 50% advance, 50% against finished material photos. Sample charges refundable on production order.<\/p>","protected":false},"featured_media":1522,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[4558],"product_tag":[],"class_list":["post-1521","product","type-product","status-publish","has-post-thumbnail","product_cat-helical-gear","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/product\/1521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/comments?post=1521"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/media\/1522"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/media?parent=1521"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/product_brand?post=1521"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/product_cat?post=1521"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gearrack.top\/ko\/wp-json\/wp\/v2\/product_tag?post=1521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}