No. Length is the dimension listings print and the one that fails least often. Four things have to match, and the other three are frequently unstated.
The four dimensions
Length, tip to tip. The obvious one, and the one every listing gives. A blade longer than the deck was made for fouls the housing; shorter, and it leaves an uncut strip between passes.
The centre opening. Either a round bore of a particular diameter, or a shaped hole — a star with a given number of arms, or a bore with flats. A round bore relies on the clamping washer to drive it; a shaped one is driven by the shape, and the two are not interchangeable.
The drive location. Many machines locate the blade on pins or bosses either side of the centre, at a particular spacing, so that the blade cannot slip. Two blades with the same bore and different pin spacing are different parts.
The offset, or dish. How far the cutting plane sits below the mounting face. Get it wrong and the blade cuts at the wrong height or, worse, contacts the deck.
Why the listings do not say
Because the shelf is served by sellers who sell by compatibility list rather than by dimension. A listing gives the length, sometimes the bore, and then a list of forty machine designations. The list is doing the work that a specification would do, and it is only as good as the seller’s cataloguing.
What actually tells you
The machine manufacturer’s own part number, printed in the manual or stamped on the old blade. With that in hand, the question disappears.
Failing that: the old blade, measured. Length, bore shape and diameter, pin spacing, and which way up the wings point.
How this site handles it
Blade pages here print the stated length and whatever the listing says about the fixing, and reproduce the compatibility list as the seller’s claim with the seller named. Where a blade is the machine maker’s own part, the page says so. No page here asserts that a part fits a machine on the strength of a marketplace listing.
The questions that keep coming in
What is a star hole?
A centre opening with several radial arms rather than a round bore, used so the blade is driven by its shape instead of by friction. Listings describe them by the number of arms, and a five-arm blade does not fit a six-arm boss.
The listing names forty machines. Is that credible?
It is credible that forty machines share a blade pattern — manufacturers reuse decks across ranges. What it is not is verified. This site reports a compatibility list as the seller’s claim and names the seller.
Last reviewed 26 September 2026