Choosing the correct gas cut off saw is an important decision for any company in the construction industry. Once you pick Husqvarna or Stihl like most contractors do, you have to understand the arbor size for diamond blades.

The most common diamond blade will come with a brass ring adapter. The brass ring is a 20mm size which fits the Stihl saw. If the brass ring is removed, it is a 1″ size which fits Husqvarna. Electing to go with a diamond blade with a 1″ – 20mm adapter option is ideal for companies that use both Husqvarna and Stihl saws. Also, if you use less than 10 blades a year, the brass ring most likely will not affect cutting action. These rings are machined into the blade, so once it is removed, it can be difficult (or impossible) to reinstall the ring.

If you are a company that uses Stihl saws exclusively and you use more than 10 blades a year, then I would recommend going with strict 20mm arbor diamond blades with no knockout adapter. A lot of smaller diamond blades companies will not carry these in stock because it can be costly to carry both options for a full line of 12″ 14″ and 16″ diamond blades. Honestly, 99% of the time, the knockout arbor will not cause any problems, but in our estimation, 10 plus blades would warrant going with a blade company that understands this need and carries the strict 20mm options in stock at all times.

Overall, if you have experienced crews, don’t use a ton of blades, and don’t use Stihl exclusively, the diamond blades with the knockout arbor or more than adequate. Any questions on this let us know!