Nitrided Ground Bushing

Many customers come in with bushing drawings and immediately ask, "Should it be carburized or nitrided?" In fact, there is no standard answer to this question-it depends on the operating conditions. Carburizing can produce a very deep case and withstand heavy impact, but heat treatment distortion is significant. Nitriding operates at low temperature with almost no distortion, the surface can be ground very smooth, and it resists high temperature and galling-making it ideal for parts requiring high precision that are sensitive to heat treatment. When we make a Nitrided ground bushing, more often than not we first help the customer make the right choice before starting machining.

In terms of process, we use nitriding steels such as 38CrMoAl and 42CrMo, nitrided at around 500°C low temperature. Surface hardness easily reaches above HV800. The compound layer plus diffusion layer together provide wear resistance, anti-galling, and corrosion resistance, with distortion negligible enough to ignore. After nitriding, high-rigidity internal/external cylindrical grinders perform finish grinding, with dimensional tolerances stabilized at ±0.005mm, roundness and cylindricity within 0.003mm, and surface ground to below Ra0.4μm. The mating surface is mirror-grade-a Nitrided ground bushing fits right the first time, no rework needed. Nitrided ground bushings are commonly used for precision valve spool bushings, hydraulic components, and high-speed bearing bushings-places requiring high precision. Every piece undergoes full inspection before shipping. Hardness gradient and case depth reports can be provided, and third-party inspection is accepted. Our factory has been making precision parts in Yuhuan for over a decade, running under IATF 16949, with supply history to Volvo and Ford. Send us your drawings; sampling takes 15–20 working days, and small batches are accepted.

● Precision hydraulic valve spools/valve sleeves, hydraulic components

● High-speed bearing bushings

● Precision instruments, testing equipment

● Construction machinery, heavy-load drives

Customization from drawings and reverse engineering from samples supported, no strict MOQ. Nitriding depth and case can be adjusted per operating condition. Material, tolerance, and surface treatment determined per drawing. Custom samples take 15–20 working days, appropriately longer for complex processes. A small sample fee is charged, fully deductible against bulk orders.

Established in 2009, located in the Yuhuan automotive parts manufacturing base in Taizhou. Plant over 5,000 sqm, 60+ employees, 100+ precision CNC machines plus 2 forging lines. Turning, milling, grinding, heat treatment, and surface treatment all in-house. Delivery and quality controlled by ourselves.

Pre-sales: response and quotation within 24 hours. In-sales: regular production photos/videos to track progress. After-sales: quality complaints responded to and investigated within 24 hours. If our responsibility, free replacement or partial refund. Also assist with customs clearance and logistics.

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