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Re: Finding a used saw?

 

I didnt think the discussion was getting too spicy.?

Im the?aforementioned well-heeled garage warrior. Although, I technically work out of my garage and my basement. I have tersa running m42 knives in my 500mm jointer, and i have a byrd in my 20" powermatic import planer. The surface finish off the byrd leaves A LOT to be desired. However, those carbide edges go and go and go and go. I swapped them after the first year of running maybe 4-5,000 bdft of 8/4 through the machine thinking, "these have to be dull by now and i am simply not noticing it". There was no distinction in cut quality after the rotation, none. The second time i rotated the inserts was 3-4 years later. I noticed a slight improvement in surface finish from that rotation. It was said before, but rotating the inserts is a complete PITA. The marketing will have you believe it's?as easy as 1,2, 3... but it's a multiple hour job. I think i timed myself the second time and it was almost two hours to mark, remove, clean, reinsert, and torque all 100+/- cutters. Now, keep in mind that is one marathon session required every 3-4 years of modest hobbyist usage. My jointer requires a 5-7 minute tersa knife swap roughly twice a year.?

Personally, i dont?care too much about the time required for a swap or the cost of the knives/cutterhead. I want the best surface finish. Between my two machines, the jointer produces the vastly superior planed surface. The byrd would be acceptable to me if i planned on running a ton of rough lumber through it and i had a means of quickly kissing it with a widebelt?afterwards. The chip compaction in my cyclone bin is very nice off the byrd. The tersa fills the bin with half as much sawdust because the shavings are long and fluffy.?

I am very interested in seeing the high end hermance, martin, felder helical cutterheads in person.?

Patrick

On Mon, May 15, 2023 at 2:21?PM David P. Best <dbestworkshop@...> wrote:
I like going into the weeds, so let me also add an additional factor to consider.? For a number of years, the knives for the Tersa head were patient protected and thus available from few suppliers (like one) and the pricing reflected that fact.? The Tersa patient has expired, availability is now close to commodity status (available on Amazon even), the inflation-adjusted prices have come down a bit, and newer versions of the knives have emerged with different steel alloys. ?

In contrast, the carbide insert on the Felder SilentPower head is proprietary to Felder, only available from them, and about a month ago someone on here was trying to find replacements and being told they are out of stock in both USA and Austria with an expected 4-6 week lead time.? Personally, I try to avoid sole-sourced consumable dependency. ?


On May 15, 2023, at 10:59 AM, David Sabo via <sabo_dave=[email protected]> wrote:

Now we're really gonna get into the weeds.? a Tersa head isn't free either.? And might even be the most expensive purchase option initially.? Depends on where it's sourced.? SCMi is prob. cheaper than Felder, and both likely cheaper than sourcing one on your own.

Right now, a SilentPower head on a 16" Hammer combo J/P is less than $200 over their self aligning blade system.? And you can have it delivered today.? Don't know what the Tersa option adds or subtracts or how long the wait would be for it to be made.? I think it's safe to say a Tersa will be more money in this scenario.

A 12" head directly from Tersa is roughly $2750 these days.



But if we're talking about a F4 Dual 51...........................I have no idea what the SP option runs on that.? I think it safe to say it's not going to be $200.


D



On Monday, May 15, 2023 at 01:23:01 PM EDT, David Davies <myfinishingtouch@...> wrote:


What nobody has factored into the cost equation is how many tersa blades you can purchase for the option cost on the insert cutterhead.? Isn't it a couple thousand dollar option?
Dave Davies

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