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Rotating Knives in a DW 735

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Forum topic by BigMig posted 09-25-2020 01:22 PM 355 views 0 times favorited 6 replies Add to Favorites Watch
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BigMig

507 posts in 3497 days


09-25-2020 01:22 PM

Topic tags/keywords: dw735 dewalt planer planer planer knives infinity thickness planer

Hey Wood Friends,
I’ve been using my Dewalt 735 to thickness plane a bunch of Philippine mahogany and I’m sure I need to flip the knives. I’ve never done it since I’ve owned the planer. I’ve relied on taking thin passes, but it’s certainly time to flip knives.

Any general advice on doing this? I have a set of new DW knives that came with the unit, but I’m pretty sure I can flip the original knives. Is it very difficult? I’m not super mechanical, but I change the oil in my car, etc. I’m just a hobbyist, and so I’m not looking to upgrade to a Shelix or anything like that.

Any/all advice will be appreciated.
Mike.

-- Mike from Lansdowne, PA


6 replies so far

View Aj2's profile

Aj2

3415 posts in 2682 days


#1 posted 09-25-2020 01:45 PM

Be sure to use a good bit I remember the screws being very tight. If you have a impact drill consider using that to break them loose. I also remember putting something on the threads when I put them back in I just cannot remember what it was.

Good Luck

-- Aj

View WhyMe's profile

WhyMe

1319 posts in 2445 days


#2 posted 09-25-2020 02:26 PM

I too needed to use an impact driver to remove the screws. Felt like the supplied hex wrench was going to break when trying to loosen by hand.

View ChefHDAN's profile

ChefHDAN

1772 posts in 3733 days


#3 posted 09-25-2020 03:46 PM

Mike, a lot depends on the age of your 735. I’m not sure when the change was made but mine, 10+ years old had hex head bolts that were as described above, and I used a 2# mallet to put some strikes onto the bolts and along with some penetrating oil got them all out, sweating every time that I’d strip one. The newer units have Torx bolts which are less likely to strip. If you find the hex heads go to amazon and get the torx head replacement set After making this change it has been much easier to change/flip blades

-- I've decided 1 mistake is really 2 opportunities to learn.. learn how to fix it... and learn how to not repeat it

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Thorbjorn88

181 posts in 1026 days


#4 posted 09-25-2020 03:49 PM

I changed mine last night. This was only the second change I’ve made and I’ve had it for about 18 months but I’ve also found the screw to be very very tight both times. I tried using the provided T wrench but it was damaged trying to get the first screw out still worked for the plastic cover but I won’t even try it on the blade screws again. I switched to a small ratchet wrench with a torx head and it worked well without the need for a mallet or other more intense persuasion. I was careful not to over tighten when I replaced the bolts.

-- Dave

View EarlS's profile

EarlS

4009 posts in 3232 days


#5 posted 09-25-2020 06:16 PM

I’m not the most mechanically inclined person, but I’ve never had any problems flipping/changing blades. Never had any problems using the T wrench that is provided with the 735 to get the Torx bolts out. There are plenty of Youtube videos on how to flip the knives. It is a fairly straightforward process. The knives have slots for the alignment pins so you just flip them end for end and reset the slots over the pins then replace the bolts then rotate the head to the next knife. Handle the knives carefully so you don’t accidently cut yourself. Even dull ones are still very sharp. The few shroud pieces and bolts go back together easily as well.

While you have it open, check the impeller on the built in blower to see how the fins look as well as clean out any debris that might be hung up in it.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View BigMig's profile

BigMig

507 posts in 3497 days


#6 posted 09-29-2020 09:38 PM

Thanks for the advice and words of caution. I may dive into it in the next week or so.

-- Mike from Lansdowne, PA

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