{"id":1696,"date":"2026-09-10T09:04:05","date_gmt":"2026-09-10T09:04:05","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?post_type=product&p=1696"},"modified":"2026-09-10T09:11:39","modified_gmt":"2026-09-10T09:11:39","slug":"ep-crossed-helical-gear-screw-gear","status":"publish","type":"product","link":"https:\/\/superiortransmissioninc.com\/ru\/product\/ep-crossed-helical-gear-screw-gear\/","title":{"rendered":"EP-Crossed Helical Gear (Screw Gear)"},"content":{"rendered":"
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Precision Motion Control \/ Crossed-Axis Gear Transmission<\/p>\n

EP-Crossed Helical Gear (Screw Gear)<\/h2>\n

A precision-manufactured helical gear<\/strong> engineered for non-parallel, non-intersecting shaft arrangements \u2014 delivering smooth, quiet motion transmission across a broad range of modules, materials, and surface treatments for industrial automation, medical equipment, semiconductor machinery, and high-speed rail applications worldwide.<\/p>\n

Explore the Full Helical Gear Range \u2192<\/a><\/p>\n<\/div>\n

Modules: M1\u2013M12 & more<\/span>
\nMaterials: Brass \/ C45 \/ SS \/ POM \/ Alloy<\/span>
\nPrecision: DIN6\u2013DIN9<\/span>
\nStandards: ISO \/ DIN \/ ANSI \/ JIS \/ BS<\/span>
\nTolerance: 0.001\u20130.1 mm<\/span>
\n\u0421\u0435\u0440\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043e \u043f\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0443 ISO 9001:2015<\/span><\/div>\n

Technical Specification Parameters<\/h2>\n

The table below presents the full specification range for the EP-Crossed \u0421\u043f\u0438\u0440\u0430\u043b\u044c\u043d\u0430\u044f \u0437\u0443\u0431\u0447\u0430\u0442\u0430\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430<\/strong> (Screw Gear) series. Because this helical gear<\/strong> family is produced to order across a wide range of modules, materials, and surface treatments, most parameters are specified per project. The ranges shown represent the standard manufacturing envelope; requirements outside these ranges are assessed on an individual basis.<\/p>\n

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\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\nEP-Crossed Helical Gear (Screw Gear)<\/th>\n<\/tr>\n<\/thead>\n
Model Number<\/td>\nM1, M1.5, M2, M2.5, M3, M4, M5, M8, M12 and etc.<\/td>\n<\/tr>\n
\u041c\u0430\u0442\u0435\u0440\u0438\u0430\u043b<\/td>\nBrass, C45 steel, Stainless steel, Copper, POM, Aluminum, Alloy, and so on<\/td>\n<\/tr>\n
Surface Treatment<\/td>\nZinc-plated, Nickel plated, Passivation, Oxidation, Anodization, Geomet, Dacromet, Black Oxide, Phosphatizing, Powder Coating, and Electrophoresis<\/td>\n<\/tr>\n
\u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442<\/td>\nISO, DIN, ANSI, JIS, BS and Non-standard<\/td>\n<\/tr>\n
Precision Grade<\/td>\nDIN6, DIN7, DIN8, DIN9<\/td>\n<\/tr>\n
Teeth Treatment<\/td>\nHardened, Milled, or Ground<\/td>\n<\/tr>\n
Tolerance<\/td>\n0.001 mm \u2013 0.01 mm \u2013 0.1 mm<\/td>\n<\/tr>\n
Finish Options<\/td>\nShot\/sandblast, heat treatment, annealing, tempering, polishing, anodizing, zinc-plated<\/td>\n<\/tr>\n
Packing<\/td>\nPlastic bag + Cartons or Wooden Packing<\/td>\n<\/tr>\n
Payment Terms<\/td>\nT\/T, L\/C<\/td>\n<\/tr>\n
Production Lead Time<\/td>\nSample: 20 business days; Bulk: 25 days<\/td>\n<\/tr>\n
\u0422\u0438\u043f \u0448\u0435\u0441\u0442\u0435\u0440\u043d\u0438<\/td>\nCrossed Helical Gear (Screw Gear)<\/td>\n<\/tr>\n
Shaft Arrangement<\/td>\nNon-parallel, non-intersecting (typical crossing angle: 90\u00b0; other angles available)<\/td>\n<\/tr>\n
Quality Management<\/td>\nISO 9001:2015<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\"superiortransmissioninc-products-EP-Crossed<\/p>\n

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What Is a Crossed Helical Gear?<\/h2>\n

A crossed helical gear<\/strong> \u2014 also known as a screw gear \u2014 is a specific configuration of the standard helical gear<\/strong> form, adapted to transmit motion between shafts that are neither parallel nor intersecting. While a conventional helical gear<\/strong> pair operates with shafts running in the same plane and at zero crossing angle, crossed helical gear<\/strong> pairs are deliberately assembled with a shaft crossing angle, commonly 90\u00b0, although other angles are achievable through matching helix angle combinations. This crossed-axis arrangement makes the screw gear fundamentally different in its contact mechanics from any other helical gear type<\/strong>: rather than line contact across the tooth face width, the contact between crossed helical gear<\/strong> teeth is theoretically a point. In well-lubricated, lightly loaded applications, this point contact is entirely adequate; it is what enables the crossed helical gear<\/strong> to transmit motion between shafts at arbitrary crossing angles without the complex geometry of bevel or hypoid gears.<\/p>\n

The EP-Crossed \u0421\u043f\u0438\u0440\u0430\u043b\u044c\u043d\u0430\u044f \u0437\u0443\u0431\u0447\u0430\u0442\u0430\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430<\/strong> series covers modules from M1 through M12 and beyond, in a material range spanning brass, C45 steel, stainless steel, copper, POM, aluminium, and alloys \u2014 reflecting the equally broad application range of this helical gear<\/strong> type. A brass crossed helical gear<\/strong>, for instance, suits instrument applications where weight and non-magnetic properties matter; a C45 steel version suits general industrial machinery; a stainless steel crossed helical gear<\/strong> suits food processing and medical environments where corrosion resistance is required; and a POM (acetal) version suits automation equipment where quiet, lubrication-free operation at light loads is the priority. This flexibility of material selection \u2014 within a consistent helical gear design<\/strong> framework \u2014 is one of the defining commercial strengths of the crossed helical gear<\/strong> product family.<\/p>\n

Precision grades from DIN6 to DIN9 are available, with tolerance bands from 0.001 mm for the finest instrument-grade applications to 0.1 mm for general-purpose industrial uses. Tooth treatments \u2014 hardened, milled, or ground \u2014 and an extensive range of surface finishing options including zinc-plating, nickel plating, passivation, anodization, Geomet, Dacromet, black oxide, phosphatizing, powder coating, and electrophoresis, all contribute to making this the most configurable product in the helical gear<\/strong> range.<\/p>\n<\/div>\n

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Five Key Advantages of the Crossed Helical Gear<\/h2>\n
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\u2460 Crossed-Axis Motion \u2014 No Bevel or Worm Gear Required<\/h3>\n

The most distinctive capability of the crossed helical gear<\/strong> is its ability to connect non-parallel, non-intersecting shafts using nothing more complex than a pair of standard cylindrical helical gear<\/strong> blanks cut with appropriately selected helix angles. Where a designer might otherwise need a bevel gear pair (limited to intersecting shafts) or a worm gear set (one direction of drive only), a crossed helical gear<\/strong> pair can handle shaft angles from a few degrees up to 90\u00b0 or beyond in either direction. The manufacturing equipment used is the same as for conventional helical gear machining<\/strong> \u2014 hobbing and grinding \u2014 so there is no tooling premium for the crossed configuration. This simplicity makes the crossed helical gear<\/strong> the pragmatic choice for instrument mechanisms, light automation drives, and any application where shaft layout constraints make bevel or worm gear geometry inconvenient.<\/p>\n<\/div>\n

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\u2461 Exceptionally Wide Material Range<\/h3>\n

Few helical gear<\/strong> products are offered across as broad a material portfolio as the crossed helical gear<\/strong> series. Brass delivers excellent machinability, dimensional stability, and corrosion resistance for instrument and medical applications. C45 steel provides a reliable, cost-effective general-purpose substrate for industrial machinery where moderate load capacity and straightforward heat treatment are appropriate. Stainless steel helical gears<\/strong> \u2014 particularly 304 and 316 grades \u2014 resist chemical attack and moisture in food processing, pharmaceutical, and laboratory environments. POM (polyoxymethylene) produces a helical gear<\/strong> that runs quietly without external lubrication, making it suitable for office automation, consumer electronics, and cleanroom systems. Copper and aluminium variants address specialist requirements around electrical conductivity and weight. This breadth of material availability from a single helical gear supplier<\/strong> streamlines procurement and ensures application-specific optimisation rather than compromise.<\/p>\n<\/div>\n

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\u2462 Multi-Standard Compliance \u2014 ISO, DIN, ANSI, JIS, BS<\/h3>\n

For buyers sourcing helical gear<\/strong> components into regulated industries or for OEM integration with equipment designed to specific national standards, the EP-Crossed \u0421\u043f\u0438\u0440\u0430\u043b\u044c\u043d\u0430\u044f \u0437\u0443\u0431\u0447\u0430\u0442\u0430\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430<\/strong> series is manufactured and inspected against ISO, DIN, ANSI, JIS, and BS standards \u2014 with non-standard configurations available on request. This multi-standard flexibility eliminates the need to qualify different suppliers for different regional markets. A medical equipment manufacturer in Japan, a semiconductor tool builder in the United States, a machine tool producer in Germany, and a solar energy systems integrator in Australia can all source from the same product family with the documentation applicable to their respective regulatory environment. Few helical gear manufacturers<\/strong> offer this combination of standard breadth and dimensional range within a single product line.<\/p>\n<\/div>\n

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\u2463 Comprehensive Surface Treatment Options<\/h3>\n

The surface treatment selected for a helical gear<\/strong> can be as consequential as the base material, particularly when operating environment durability, friction coefficient, or appearance standards are specified by the end customer. The crossed helical gear<\/strong> series is available with zinc plating, nickel plating, passivation, oxidation, anodization, Geomet coating, Dacromet coating, black oxide, phosphatizing, powder coating, and electrophoresis \u2014 a treatment portfolio that covers corrosion protection, decorative finish, friction reduction, and wear resistance requirements across virtually the full spectrum of light-duty industrial applications. Geomet and Dacromet coatings in particular are specified increasingly in European automotive and aerospace supply chains for their chromate-free corrosion protection, and the availability of these coatings on a precision helical gear<\/strong> represents a meaningful product differentiation for buyers in those sectors.<\/p>\n<\/div>\n

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\u2464 Fast Lead Times with Sample Programme<\/h3>\n

For design engineers evaluating the crossed helical gear<\/strong> at prototype stage, the availability of samples within 20 business days \u2014 combined with bulk production in 25 days \u2014 is a practical advantage that shortens development cycles. Many helical gear<\/strong> manufacturers require tooling runs or minimum quantities before samples can be supplied, creating bottlenecks in the early stages of mechanism design. The sample programme for the crossed helical gear<\/strong> series allows engineers to confirm fit, function, and tooth mesh quality before committing to a production order, reducing the risk of expensive late-stage design changes. Payment terms include T\/T and L\/C, and packing defaults to plastic bag and carton or wooden case depending on order volume and destination \u2014 standard international shipping compliance without additional negotiation.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\"superiortransmissioninc-products-EP-Crossed<\/p>\n

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How a Crossed Helical Gear Works<\/h2>\n

To understand how a crossed helical gear<\/strong> transmits motion, it helps to begin with the geometry of a single helical gear<\/strong> tooth. In a conventional parallel-shaft helical gear<\/strong> pair, both gears share the same normal module and operate with helix angles of equal magnitude but opposite hand. The mating teeth engage in line contact that sweeps across the full face width during the mesh cycle. A crossed helical gear<\/strong> pair uses a fundamentally different arrangement: the two gears can have the same or different helix angles, and both can be the same hand (both right-hand or both left-hand) or opposite hands, depending on the required shaft crossing angle. For a 90\u00b0 shaft angle \u2014 the most common crossed helical gear<\/strong> application \u2014 both gears are typically cut with the same helix angle (e.g., both at 45\u00b0) and the same hand.<\/p>\n

Because the shafts cross rather than being parallel, the contact between mating helical gear<\/strong> teeth is point contact rather than line contact. This geometric reality has two practical consequences. First, the load-carrying capacity of a crossed helical gear<\/strong> pair is substantially lower than a comparable parallel-shaft helical gear<\/strong> set of the same module and face width, since load is concentrated at a point rather than distributed along a line. Second, and more critically from a wear standpoint, the tooth contact involves significant sliding rather than predominantly rolling motion. Unlike parallel-shaft helical gear<\/strong> pairs where the sliding component at the contact zone is relatively small, crossed helical gear<\/strong> pairs experience combined rolling and sliding throughout the tooth mesh cycle. This sliding is what generates the frictional heat and wear that limits the crossed helical gear<\/strong> to light-duty, relatively slow-to-moderate speed applications unless premium lubricants and surface finishes are employed.<\/p>\n

The relationship between helix angle selection and the achievable shaft crossing angle gives the crossed helical gear<\/strong> its design flexibility. If the helix angle of Gear 1 is \u03b1\u2081 and the helix angle of Gear 2 is \u03b1\u2082, and both are the same hand, the shaft crossing angle \u03a3 = \u03b1\u2081 + \u03b1\u2082. If they are opposite hands, \u03a3 = \u03b1\u2081 \u2212 \u03b1\u2082. This simple algebraic relationship means an engineer can target any required shaft crossing angle by selecting appropriate helix angle combinations \u2014 a level of geometric flexibility not available from any other helical gear type<\/strong>. Combined with the ability to run the crossed helical gear<\/strong> pair with a speed ratio independent of the tooth count ratio when helix angles differ, this makes the crossed helical gear<\/strong> a compact, versatile motion element for complex mechanism designs.<\/p>\n

Lubrication of a crossed helical gear<\/strong> pair is important precisely because of the high sliding ratio at the tooth contact. For metal crossed helical gear<\/strong> pairs \u2014 brass, steel, or stainless steel \u2014 an appropriate gear oil or grease is required to prevent adhesive wear at the contact point. POM and similar polymer crossed helical gear<\/strong> variants are self-lubricating to a degree, tolerating dry operation at light loads and moderate speeds, which accounts for their popularity in office automation and consumer electronics applications where periodic relubrication would be impractical.<\/p>\n<\/div>\n

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Material Selection & Quality Standards<\/h2>\n

Selecting the correct helical gear material<\/strong> for a crossed helical gear<\/strong> application requires considering not only the transmitted load and operating speed but also the environment, the mating gear material, and the lubrication condition. Because crossed helical gear<\/strong> pairs involve significant tooth sliding, the tribological compatibility of the mating materials is particularly important: metal-on-metal pairs require good lubrication; dissimilar metal pairs (e.g., brass wheel against steel pinion) can reduce adhesive wear risk; polymer-on-metal pairs enable dry operation at the cost of reduced load capacity.<\/p>\n