KHK USA 推出双导程蜗轮蜗杆副，轴向移动即可精调背隙

By KHK USA Inc.Monday, November 2, 20261 min read

KHK Duplex Worm Gear with dual-lead tooth profile for axial backlash adjustment

KHK USA Inc., a factory-owned distributor of the market-leading KHK® brand of metric gears, is pleased to announce its innovative Duplex Worm Gears, engineered to streamline the adjustment of backlash in worm gear assemblies. Unlike conventional systems requiring alterations to the gearbox housing, KHK’s duplex solution enables easy, precise backlash adjustments through simple axial movement of the worm shaft, reducing both installation time and maintenance complexity.

Dual-Lead Tooth Profile

Duplex worm gears incorporate a unique dual-lead tooth profile. By forming a difference between the right and left tooth surfaces, the tooth thickness varies continuously along the worm, allowing fine backlash adjustment as the worm moves axially. This precise movement ensures optimal gear engagement without the need for labor-intensive rework, as adjustments made by shifting the worm axially eliminate the need for major gearbox rework. Tooth thickness variation enables continuous control over backlash; moving the worm in the arrow’s direction brings thicker teeth into mesh and reduces backlash. Each 1 mm shaft shift typically reduces backlash by 0.02 mm, providing reliable and predictable results.

Integration and Precision

Duplex Worm Gears from KHK USA are designed for easy integration in multiple assembly styles, including screw- and shim-based adjustment layouts. Clear visual arrows and reference grooves on both the worm and worm wheel ensure intuitive installation and precise backlash control. The gears achieve near-zero backlash (±0.045 mm tolerance) when properly aligned with the designated reference marks and set to the specified center distance.

Assembly and Documentation

KHK emphasizes the importance of following the provided assembly instructions to guarantee proper function and longevity. All KHK Duplex Worm Gears are manufactured to the highest standards and come with detailed technical documentation to support designers and maintenance teams.

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KHK USA Inc.

Founded in 1935, Kohara Gear Industry Co., Ltd. is a leading manufacturer of gearing in Japan. Having been a company solely devoted to the manufacture of gears for 89 years, Kohara Gear Industry (KHK) is world-renowned for its KHK brand of gears. In 2005, KHK completely rebuilt its headquarters and factory location in Kawaguchi, Japan, to the latest earthquake standards. In 2019, KHK introduced their latest catalog KHK 3015. This catalog contains approximately 200 styles of metric gearing in more than 27,000 configurations. Throughout its' 89-year history, KHK has remained strictly a manufacturer of gears and has offered its' products for sale only via distribution. Beginning July 1st, 2015, KHK ventured into direct sales by creating KHK USA Inc. Based in Mineola, New York, this operation is a wholly owned subsidiary of Kohara Gear Industry. KHK USA is a factory direct, full-service distributor of KHK gears with a large selection of products available off-the-shelf and via frequent replenishment to meet your gearing needs. On staff application engineers can assist you with the selection of gears for your design or they can produce custom gear quotations for you. KHK USA offers convenient web-based shopping, offers free 3D CAD models for download, and offers both a free print catalog and the ability for you to download the entire catalog in PDF format. Kohara Gear Industry is both ISO9001:2015 and ISO14001:2015 certified. With the largest selection of standardized metric gears in North America, KHK USA's team of professionals look forward to assisting you with all of your gearing needs. The KHK product line includes the following Gears. Custom gears are also available. Spur Gears Pinion Gears Helical Gears Ring Gears/Internal Gears Gear Racks Miter Gears Bevel Gears Worm Gears Splines & Bushings Ratchets & Pawls Herringbone Gears/Double Helical Gears Gearboxes Gear Couplings Inch Gears Internal Gears Gear Boxes Screw Gears Racks Gear Boxes Gear Calculation Software Custom Gears View Full Catalog Read the Full IMD Talking Shop with KHK Gears Here

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KHK USA Inc.
Founded in 1935, Kohara Gear Industry Co., Ltd. is a leading manufacturer of gearing in Japan. Having been a company solely devoted to the manufacture of gears for 89 years, Kohara Gear Industry (KHK) is world-renowned for its KHK brand of gears. In 2005, KHK completely rebuilt its headquarters and factory location in Kawaguchi, Japan, to the latest earthquake standards. In 2019, KHK introduced their latest catalog KHK 3015. This catalog contains approximately 200 styles of metric gearing in more than 27,000 configurations. Throughout its' 89-year history, KHK has remained strictly a manufacturer of gears and has offered its' products for sale only via distribution. Beginning July 1st, 2015, KHK ventured into direct sales by creating KHK USA Inc. Based in Mineola, New York, this operation is a wholly owned subsidiary of Kohara Gear Industry. KHK USA is a factory direct, full-service distributor of KHK gears with a large selection of products available off-the-shelf and via frequent replenishment to meet your gearing needs. On staff application engineers can assist you with the selection of gears for your design or they can produce custom gear quotations for you. KHK USA offers convenient web-based shopping, offers free 3D CAD models for download, and offers both a free print catalog and the ability for you to download the entire catalog in PDF format. Kohara Gear Industry is both ISO9001:2015 and ISO14001:2015 certified. With the largest selection of standardized metric gears in North America, KHK USA's team of professionals look forward to assisting you with all of your gearing needs. The KHK product line includes the following Gears. Custom gears are also available. Spur Gears Pinion Gears Helical Gears Ring Gears/Internal Gears Gear Racks Miter Gears Bevel Gears Worm Gears Splines & Bushings Ratchets & Pawls Herringbone Gears/Double Helical Gears Gearboxes Gear Couplings Inch Gears Internal Gears Gear Boxes Screw Gears Racks Gear Boxes Gear Calculation Software Custom Gears View Full Catalog Read the Full IMD Talking Shop with KHK Gears Here
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