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Cooler temps means denser hardwood howw are you adjusting feeds?

Corvus_Fallen

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Joined
Oct 16, 2025
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I do small home-improvement projects year-round like cabinet doors, trim pieces, the occasional cutting board and I’ve noticed the hardwood stock feels a bit tougher now that the temps have dropped. I’m wondering if anyone here actually tweaks their feed or spindle speed once fall hits. Do cooler temps (and lower humidity) make enough difference in density to matter, or is it just in my head? I’ve been getting slightly more chatter and a rougher finish on oak lately. Curious if you guys slow things down a touch or just power through with sharper bits.
 
fall and winter wood cuts different for sure. The lower humidity sucks the moisture out and makes the fibers stiffer. I don’t really change RPM much, but I’ll slow the feed just enough to stop chatter. Keeping a consistent temp in the shop helps too.
 
@Corvus_Fallen yeah, cooler temperatures mean lower indoor humidity, which slightly reduces the MC of your stock. This loss of moisture makes the wood effectively stiffer and harder. Try slightly reducing your feed rate to maintain the correct chip load for this stiffer material, and you should see the chatter disappear
 
I used to think that was just in my head until I noticed my shop vac filling up slower in winter like the chips were finer, which means harder cuts. These days, I just slow the feed a little and wax the bit flutes for smoother ejection. Less burn, cleaner edges. The oak’s definitely less forgiving when the air gets dry, especially with older stock.
 
Colder air can definitely make hardwood feel a bit tougher, especially oak. Even small humidity drops change how cleanly it cuts. Dry, cool stock tends to cut “crisp,” which can show up as chatter if the tool is even slightly dull. Some folks drop feed just a hair until winter levels out.
 
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