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Reply by knotscott

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Posted on Looking for a different table saw, new or used...

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knotscott

8386 posts in 4258 days


#1 posted 02-04-2018 05:52 PM


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What is a trunnion and what is a pre-riving knife?

Also, is it easy to install the Delta t3? What advantage is this over the stock fence?

- bassett72

The trunnions are a major part of the underpinnings that hold the blade arbor and allow it to raise and tilt. Cabinet mounted trunnions are mounted to the cabinet, and are easier to align, while table mounted trunnions hang from the underside of the table and require the whole system to be. Cabinet mounted trunnions were typically found on industrial cabinet saws, and have a history of being more robust just due to the sheer duty ratings of the saws they were on. The lines have blurred a lot in recent years, with several hybrid saws now offering cabinet mounted trunnions that are similar in duty rating to the traditional table mounted trunnions of the old contractor saws.

Cabinet mounted trunnion system:

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Grizzly G1023RL industrial cabinet saw trunnions:

Hybrid saw with cabinet mounted trunnions:

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Table mounted trunnion system:

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traditional contractor saw with table mounted trunnions:

hybrid saw with table mounted trunnions:

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A riving knife is a type of splitter that raises, lowers, and tilts with the blade, vs a traditional splitter that is either fixed in place, or only tilts with the blade. Both accomplish the same task of preventing the wood from pinching against the back of the blade causing kick back. The riving knife generally sits in closer proximity to the blade, and is preferable to a standard splitter, though IMO lack of a riving knife is not sufficient reason to pass up an otherwise nice saw at the right price. The term “pre-riving knife” simply means the saw was made before riving knives became popular in 2009.


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