13 August 2016
13 August 2016,

Bridgeport is the home of the R8 collet.  Bridgeport set the standard for milling machines and was a lead innovator in CNC milling.  The R8 collet was a true revolution in milling.

The R8 Tool Advantage

The invention of R8 collets represented  a giant leap forward in machining.  It allowed for rapid tool changing and paved the way for automation of the tool changing process.

bridgeport mill

By BUEngineer https://commons.wikimedia.org/w/index.php?curid=30226369


Since the R8 collets fit into the taper itself, it requires an exact match between the collet and the tool shank. With the R8 design, the collet is compressed by a drawbar from behind.  Since they have no separate chuck and are self releasing, tool changes could now be automated.

With the tool firmly in the taper, you achieved more rigidity from the end mill.  Better, more efficient work on a reliable basis.  That was the R8 tool advantage.


R8 Tools Become the Quick Change Artist

These days, R8 collets are known as the quick change artists of the CNC world.  As important as the mill and the software running it, the collets facilitate rapid tool-changing to maximize productivity.  Just do any simple Google search of the term R8 collets and you’ll find pages with headlines like


You’ll also discover that R8 collets aren’t cheap.  As any CNC’er knows the tooling can quickly get as expensive as the machine itself.  Tooling is an investment and it’s an investment you want to protect.  Those quick change artists are at risk every time they are transported to and from storage.  If they don’t have a safe crib, they’re in danger during storage as well.   That’s where special R8 tool holders come into play.

r8 tool holder to protect collets

R8 Tool Holders for Protection

R8 tool holders are special trays designed to store and transport your R8 collets safely.  While there are a number on the market, none beat the quality and performance of the Sierra American R8 tool holder.  Here’s why.

Strong.  The Sierra American Multi-Systems R8 tool holder is engineered from a sturdy impact-resistant material.  You get light-weight storage without sacrificing strength or stability.

Full Storage.  The R8 tool holder can accommodate up to 52 collets, including oversized tooling and boring heads.  That’s enough for a full set plus emergency back-up supplies.

Quality.  Don’t trust your expensive tooling to cheap tool holders made in China with inferior materials.  Get American made quality when you get Sierra American.  Every product is proudly made in the USA by American craftsman; just like you.

Don’t get ripped off by imitators.  Ask for Sierra American by name!  If your supplier doesn’t carry Sierra American ask them to order it for you.  Call (800) 576-5331 to find a dealer near you.




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