Description
The blade fits the job and the arbor does not. It is a small problem with a big cost, because a blade that will not mount is a wasted trip whatever it cost. Bushings are the cheapest insurance in the truck box.
Why arbor sizes vary at all
Blades are manufactured for a range of machines and a range of markets, so the same 14″ diameter can arrive with different center bores. Larger blades commonly carry a 1″ bore because that is what walk-behind and flat saws use; smaller handheld blades typically come with a smaller bore to suit cut-off saws and grinders. A reducer bushing sits inside the larger bore and steps it down to match the smaller spindle on your saw.
Fitting them properly
- Seat it fully. A bushing that is proud on one face will not let the flanges clamp square, and a blade running out of true is dangerous, not just inaccurate.
- One bushing at a time. Never stack two to make up a size.
- Check the direction arrow after fitting — it is easy to reverse a blade while wrestling with a bushing.
- Confirm the blade is rated for your saw’s spindle speed before adapting anything to fit it.
Keep the set with the saw rather than in the blade case, so it is present when the blade is not. Browse accessories and parts.
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