About us

Purros Machinery Factory

The Plant of PURROS Machinery Co., Ltd.

Corporate Video From RBT

RBT‘ is the sub-brand of PURROS Machinery Co., Ltd. focus on Global Standard for Roller Burnishing Tools. Since 2007, we have served more than a thousand customers, until now customers have continued to use our products – a testimony to our high quality. Customers’ trust and support are our motivation to advance. We will continue to provide customers with burnishing solutions to meet sizing and finishing needs, with faster production and at a lower cost. Thank you!

Why you should use Roller Burnishing Tools (Roller Burnishing Tool Functions)?
Roller Burnishing Defined:
Roller burnishing is a surface finishing technique in which hardened, highly polished steel rollers are brought into pressure contact with a softer piece part. Roller burnishing replaces grinding, honing, lapping and other expensive secondary operations.
As the pressure generated through the rollers exceeds the yield point of the piece-part material, the surface is plastically deformed by cold flowing of sub-surface material. The result is a mirror-like finish and a tough, work-hardened surface with load-carrying characteristics which make the burnished surface superior to finishes obtained by abrasive metal-removal methods.

Primary Benefits with Roller Burnishing Tools

Improved Surface Finish
Improved Size Control
Increased Surface Hardness
Improved Fatigue Life

Line up of RBT’s Tools

Inside Diameters(Holes)
Outside Diameters(Shafts)
Flat Surfaces
Spherical Surfaces and Contours
Fillets(Radii at Shoulders)
Single Roller Burnishing
Diamond Burnishing
Skive & Roller Burnishing
Rotary Broaching
Chamfering & Deburring