Address
Automotive and Motorcycle Industrial Park, Yuhuan City, Taizhou, Zhejiang Province, China
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Precision Drive Components for Demanding Application
Custom gear shafts, splined shafts and transmission components supported by engineering review and precision manufacturing.
What We Manufacture
Gear Shafts
Custom gear shafts
Heat treated
Ground bearing seats
DIN accuracy levels
Splined Shafts
External splines
Internal splines
Precision fit
Transmission systems
Custom Gears
Spur gears
Helical gears
Precision machining
Transmission Components
OEM drive parts
Custom assemblies
Engineering Challenges We Solve
Shaft Runout Issues
Concentricity control
Bearing seat accuracy
Heat Treatment Distortion
40CrMo control
Post-treatment inspection
Premature Spline Wear
Fit optimization
Material recommendations
Gear Noise Problems
Profile accuracy
Assembly considerations
Featured Engineering Reviews
Engineering insights from real manufacturing projects, failure analysis, and production experience.
Why are 90% of fluid fitting leaks caused by machining defects, not O-ring failures?
June 18, 2026
In fluid systems, we often instinctively blame leaks on the O-ring. However, after analyzing countless field failures, we’ve found the root cause is almost always machining inconsistency. If the thread geometry is off, the chamfer definition is unclear, or the valve seat surface varies by even a fraction of a millimeter, no O-ring can compensate
Achieving DIN 6 Precision for Small-Diameter Gear Shafts: Our Proven Process
June 17, 2026
Precision is everything for small-to-medium gears. A deviation of just a few microns can lead to noise, excessive vibration, or premature failure. At RJ Factory, we have spent 13 years refining our manufacturing process for components within the 150mm diameter and 300mm length range. Here is how we consistently achieve DIN 6 precision standards: 1. Material Integrity
Why Choose RJ Factory for Your Precision Custom Machining?
June 16, 2026
In the manufacturing industry, selecting a reliable production partner is about more than just product quality; it directly impacts your project timeline, total costs, and final product reliability. With over 13 years of expertise in precision component manufacturing, RJ Factory is dedicated to providing global industrial clients with stable, efficient, and high-performance custom machining solutions. Advanced Equipment
304vs316 Stainless Steel
June 10, 2026
If cost-efficiency is your priority for standard environments, 304 is ideal. For marine, chemical, or highly corrosive environments, the addition of Molybdenum in 316 makes it the superior choice Property / Specification H59 Brass 304 Stainless Steel 316 Stainless Steel Chemical Composition Cu ≈ 59%, Zn balance Cr 18%, Ni 8% Cr 16%, Ni 10%, Mo 2% Corrosion Resistance
Recent Case Studies
304vs316 Stainless Steel
June 10, 2026
