KBS Rollobend System

KBS Long-Radius Roller-Bearing Tubing Benders

Get Precise and Reproducible Bends on Electro-Polished Stainless Steel Tubing.  For Ultra-High Purity UHP Thin-Wall Electro-Polished Stainless Steel Tubing.

KBS Tubing Benders

Bend Steel, Stainless Steel, Aluminum, Brass, Soft and Some Hard Copper and Titanium

  • Each tool bends up to 180 degrees and large radius bends are ideal for preventing smooth inside walls from cracking, flaking and generating particulate contamination.   
  • The open side slips over the tubing at any point. You get smooth long bends with no marking, scraping or flattening. 

KBS Rollobend system

About Us

In the mid 1980's a well known semi-conductor fabrication facility in silicon valley was experiencing a 40% rejection rate of their chips due to particulate contamination in their process piping caused by bending tubing with standard radius tubing benders.

A contractor installing the process lines was asked if he could come up with a solution to the problem. After a couple of years of trial and error, the KBS Long-Radius Tubing Bender was invented and reduced the rejection rate from 40% to less than 10%. For a number of years now, KBS Long-Radius Tubing Benders have been required by all chip plants for contractors installing high-purity process piping.

Some of our high purity process piping installation customers include:

Dynamic Systems Inc.

John W. Danforth Co.

BMWC Constructors


Total Facility Systems

Harder Mechanical

Indexa USA

Charter Mechanical

JB Henderson Construction

H.T. Lyons

Apollo Mechanical

U.A. JATC Plumbing & Pipefitters Training Centers throughout the U.S. and Canada

This system has been approved and used in major micro-electronic facilities and by contractors throughout the United States.


For Application Assistance or to Order call (408) 499-4891

Industry Standard Radius for Semi-conductor Tool Install is 2.50″ Radius

Standard Rollobend System, 2.50" radius*

1/4" tube OD x .035" wall thickness3/8" tube OD x .035" wall thickness1/2" tube OD x .049" wall thickness
Part # 4100 10X, 2.50" radiusPart # 6600 6.67X,2.50" radiusPart # 8500 5X, 2.50" radius

Other Rollobend System Sizes, 1.25" - 5.00" radius

1/4" tube OD x .035" wall thickness3/8" tube OD x.035" wall thickness1/2" tube OD x.049" wall thickness
Part # 4500 5X, 1.25" radiusPart # 6500 5X, 1.87" radiusPart # 8100 10X, 5.00 radius
Part # 6100 10X, 3.75" radius

*Recommended combination is #4100, #6600, #8500, maintaining even center-to-center distance.

These tubing benders are not for use with wall thicknesses heavier than the specification shown here, and are not designed for high-pressure hydraulic tube bending applications


Long Radius Tubing Benders

A Specified Tool

If you are a contractor and / or a facility involved in high-purity orbital welding operations KBS Long Radius Tubing Benders are a specified tool.

100% Made In The USA

In Stock and 100% Made in the USA


KBS Long Radius Tubing Benders have been specified and required by major micro-electronic manufacturing facilities for their high-purity process piping system installations throughout the United States and the world . 

Probend industries


Photo of sample bends with 4100 and 4500
Two sets of markings reside on the front face of the bender. The first set is the bend angle scale. It ranges from 0º to 180º in five degree increments and shows how many degrees of angle that are available. The second is the angle starting scale, and these marks are for lining up the bend point. Not all of these indicators are numbers. The “R” and “L” points are designated this because of their relationship to one another. The ‘”L” is the 90º degree bend point and the R” is the 60º degree bend point. If you need to make a reversed 90º degree bend, you would line your 90º degree bend mark up with the “R”.
Bender markings and Indicators
Probend Industries - Bender Markings and Indicators
Probend Industries - Bender Markings and Indicators


All tubing will exhibit springback after a bend has been completed.The amount of springback depends on the bend angle, bend radius, tubing material and wall thickness.
With some experience you will be able to predict the amount of springback to expect. Please allow for 1 to 3 degrees of compensation.
Verify the bend angle using a template, protractor or against a known angle to ensure the correct bend angle has been achieved.
Probend Tube Bending Tools
Probend Tube Bending Tools

Quality Control/Quality Assurance

Before acceptance to the ProBend Industries Distribution Center each and every ProBend/KBS Long Radius Tubing Bender must pass strict adherence to Dimension and Tolerance specifications. This includes weld joint integrity, fit and finish.


The rugged heavy-duty, high-quality industrial grade construction of the KBS Long Radius Tubing Benders makes them the best tubing benders available throughout the world.

Quality Control and Quality Assurance - Probend Industries
Quality Control and Quality Assurance - Probend Industries


Get A Quotation!

Call me

(408) 499-4891

Email me


My location

Santa Clara, CA, USA


Hours :   24/7


(408) 499-4891