How Gearseiko Defines a New Standard for High-End Drives

Featured with superior load capacity and excellent tooth surface contact strength, circular arc gears are widely adopted as preferred components in high-speed, heavy-load and high-reliability transmission equipment. Gear accuracy grade and backlash control act as core factors deciding overall operating performance, rather than merely tooth profile design.

As a professional high-precision gear manufacturer, Gearseiko strictly complies with GB/T 15753-1995 Accuracy of Circular Arc Cylindrical Gears, setting stringent quality benchmarks for circular arc gear production.Check Gearseiko standard-compliant circular arc gear manufacturing and customized backlash control solutions here.

In accordance with GB/T 15753-1995, circular arc gears and paired gear sets are classified into five accuracy grades ranging from Grade 4 to Grade 8 in descending precision order.

Grade 4 stands for the top manufacturing level, applicable to equipment with strict limits on transmission error, vibration and noise. Grade 8 fits conventional general power transmission scenarios.

Gearseiko maintains stable production capacity covering Grade 4 to Grade 7, with mature mass manufacturing advantages in Grade 5 and Grade 6 products. All tolerance deviations are divided into three groups respectively corresponding to motion accuracy, running smoothness and contact uniformity.

Flexible grade matching is available to balance performance and production cost. Different tolerance groups can be assigned independent accuracy grades, while all parameters within one single tolerance group keep consistent precision level to secure reliable quality control.

Different from common involute gears, circular arc gear backlash is restricted by inherent basic tooth profile. It cannot be randomly adjusted by tool radial displacement or center distance variation, which is a key technical point easily misunderstood by ordinary manufacturers.

Gearseiko owns rich practical experience in backlash regulation. For regular orders without special backlash limits, smooth unjammed rotation is taken as basic delivery criterion, backed by rigorous tooth profile and machining precision control.

For high-end scenarios including aerospace actuators, precision machine tool spindles and low-temperature transmission systems demanding customized backlash, two mature solutions are applied: developing dedicated hobs to set backlash at design stage, and adopting tangential hob shifting to realize fine adjustment. Both methods conform to national standards without altering center distance or radial modification.Learn more about Gearseiko circular arc gear tangential shifting processing technology here.

All circular arc gears are manufactured following GB/T 12759-1991 basic tooth profile rules and GB/T 1840-1989 module series standards.

Standard production scope: normal module 1.5–40 mm, pitch diameter within 4000 mm, effective face width up to 630 mm.

For oversized module, diameter and face width specifications beyond standard range, technical derivation based on geometric tolerance relation supports customized processing. The team also adapts standard data for non-standard tooth profile designs, realizing standard-based unrestricted personalized customization.

Accuracy grade classification and backlash precision control serve as core competitiveness indicators in circular arc gear industry. Gearseiko fully masters technical clauses of GB/T 15753-1995 and converts standard requirements into tangible performance improvement.

We deliver one-stop solutions covering Grade 4 ultra-low backlash gears and tangential shifting customized products, equipped with solid high-end batch production strength.

Reach out to Gearseiko professional engineering team for reliable circular arc gear matching service, and empower your transmission system with outstanding precision and durability.

Visit official website //www.gearseiko.com to acquire technical consultation and favorable manufacturing quotation.

Gearseiko – Definier of Circular Arc Gear Accuracy, Practitioner of High-End Power Transmission.

A1: Five grades from Grade 4 highest precision to Grade 8 general precision in line with GB/T 15753-1995.

A2: No, its backlash is determined by basic tooth profile, not adjustable by center distance or radial tool displacement.

A3: Custom dedicated hob design and tangential hob shifting machining to meet special backlash demands.

A4: Normal module 1.5–40mm, pitch diameter ≤4000mm, effective face width ≤630mm.