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Hamish Casimir
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Dave you are correct regarding the type of material you mainly use having an effect on finish quality. Say if you had exclusive access to clear, straight grained softwood, or mahogany, you get a quality better finish from straight knives.
If you are a fine woodworker then even if you are using top quality softwood, you are still going to have to handplane or finish sand for the best surface.?
If you are doing entry level, high volume production work in softwood, and can get good quality wood, I'd go for conventional blades.
If you work with many different woods, hardwoods, highly figured woods, less than perfect grain or knots, regular blades can give you serious tear out. After planing some fiddleback purple heart, for a small tabletop, with regular knives, I needed to spend
the best part of a full week scraping, then sanding the top smooth enough to get a top quality finish.
Not something you want to do when time =money.
Horses for courses, when we're talking about specificity. For many and varied tasks I'd choose a helical cutterhead, for its versatility?
?Hamish.
From: [email protected] <[email protected]> on behalf of David Sabo via groups.io <sabo_dave@...>
Sent: Wednesday, 13 January 2021 9:23 AM To: [email protected] <[email protected]> Subject: Re: [FOG] 12" or 16" Jointer /Planer ?
Hamish - I agree will everything except helical head.?
Too many people say that like it¡¯s a no brainer. ?It¡¯s not. Depending on what your main material is , it might leave a worse finish.?
As fir quickness of setting / changing blades , a Tersa head or similar is 10 to 50 times faster for changeover and doesn¡¯t require a torque wrench.?
Dave
On Jan 12, 2021, at 4:53 PM, Hamish Casimir <hamishcasimir@...> wrote:
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