Borelli Splined Coupling Halves – 34200 – 34300 – 34400 – 35500 Series

Description

Construction Features and Materials

The Borelli Splined Coupling Halves – 34200 – 34300 – 34400 – 35500 Series provide high-precision mechanical coupling solutions for the hydraulic industry and hydraulic component applications. The standard construction of these components uses UNI 16CrNi4/Pb steel, which undergoes specific heat treatments to ensure durability and wear resistance under load. For applications requiring superior mechanical performance, the range includes special variants manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel. These models undergo an additional nitriding treatment, known as Tenifer, which significantly enhances component performance, providing mechanical strength (R) ranging from 95 to 105 kg/mm².

Spline Profiles and Reference Standards

The Borelli Splined Coupling Halves – 34200 – 34300 – 34400 – 35500 Series are designed to comply with major international industrial standards for spline profiles. The external splines (identified by dimension B) are manufactured in accordance with DIN 5482 standards, with profiles ranging from B 25×22 to B 50×45 depending on the specific model. For the internal splines (identified by dimension A), the range offers extensive connection versatility, including profiles compliant with DIN 5480 standards (e.g. W30x2x14x9H, W35x2x16x9H, W40x2x18x9H) and inch-based profiles such as 12/24″ DP and 16/32″ DP. This wide variety enables smooth and secure integration into numerous pump assemblies and complex hydraulic transmission systems.

Dimensions and Spline Configurations

The number of external teeth varies according to the series and coupling size, ranging from 14 teeth for the most compact models to 24 teeth for larger-diameter couplings. Similarly, the number of internal teeth ranges from 9 to 23, allowing precise matching with the specifications of the motor shaft or connected pump. For example, the 34200 Series features 20 external teeth with a B 40×36 DIN 5482 spline profile and internal spline options with 14 teeth, featuring either a 12/24″ DP profile or a W30x2 DIN 5480 profile. The 34400 Series features 24 external teeth (B 50×45 DIN 5482) and offers an extensive range of internal configurations with 16/32″ DP profiles. The overall dimensions are standardized: the total length (L) ranges from 20 mm to 50 mm, while dimension C varies between 5 mm and 8 mm depending on the selected model. These coupling halves ensure optimal alignment and highly efficient torque transmission.

Technical Summary Table of the Main Specifications of the Borelli Splined Coupling Halves – 34200 – 34300 – 34400 – 35500 Series

Product Codes