A Smart Solution When You Can't Machine an Internal Spline
We provide Precision bushing carburizing and nitriding grinding with carburizing, nitriding, and grinding processes. Taizhou Liuhuan Machinery produces this component as a separate internal spline sleeve.
Its function is to connect an external spline shaft to a component with a smooth bore, such as a gear, sprocket, or timing pulley. This solution is used when it is not feasible to machine an internal spline directly into the driven part.
It also allows for axial position adjustment and simplifies assembly. Typical applications include transmission shift mechanisms, adjustable-spacing drive systems, and power connections that require axial sliding.
Internal Spline and Concentricity: Power Without Vibration
The Precision bushing carburizing and nitriding grinding internal spline is the key feature of this component. We use high-precision broaching or wire EDM for machining, ensuring compliance with DIN 5480 or ISO 4156 standards. Precision grades of 6H or 7H can be achieved.
We strictly control the concentricity between the internal spline and the outer diameter (or outer locating surface), typically maintaining it within Φ0.02 mm.
This ensures that power transmission through the bushing occurs without additional radial runout or vibration.
|
Parameter |
Specification |
| Spline Standards | DIN 5480, ISO 4156 |
| Spline Precision Grade | 6H, 7H |
| Concentricity | <Φ0.02 mm |
| Material Options | 40Cr, 42CrMo, GCr15, 20CrMnTi |
| Tooth Surface Hardness (Sliding Type) | ISO 3548 or CustomHRC 58-62 |
| Module Range | M0.5 to M10 |
Material and Heat Treatment Based on Sliding Requirements
Material selection depends on torque levels and whether axial sliding is required.
For static, high-torque connections, we use quenched and tempered steels such as 40Cr or 42CrMo. For applications involving axial sliding, we use bearing steel GCr15 or carburizing steel 20CrMnTi.
Surface hardening or carburizing is applied to the internal spline teeth, resulting in a hard, wear-resistant layer (HRC 58–62). During heat treatment, distortion is carefully controlled to maintain spline accuracy.
Flexible Design: A Functional Module
We manufacture internal spline bushings with modules ranging from M0.5 to M10 and in various lengths.
In addition to standard designs, we can incorporate functional features as needed. For example, we can add flanges for axial positioning and bolt fixation, machine keyways or set screw holes on the outer diameter for anti-rotation, and include guide chamfers on the spline ends for easier assembly.
Our goal is to provide a complete, ready-to-use internal spline bushing module that simplifies your design and enhances overall transmission system performance.
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