Delta DC-380 Planer Knife Screw Head Size?

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Forum topic by KevinSullivan posted 05-05-2013 12:36 AM 1162 views 0 times favorited 3 replies Add to Favorites Watch
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12 posts in 2684 days

05-05-2013 12:36 AM

A used DC-380 I bought came without a wrench to loosen/tighten the jib nuts (knife securing screws). The 5/16 that I use on a jointer is too small. 10mm is a tad too large and will strip the bolts. I don’t have a 9mm. Is that what I need? If you know the correct wrench dimensions, please let me know. (I don’t have calipers to measure, or I would.) Thanks,—Kevin

3 replies so far

View Kickback's profile


127 posts in 2661 days

#1 posted 05-05-2013 12:56 AM

I think they are 9mm i have a DC-380 and i can take a look at it tomorrow and tell you for certain.

-- "I work so I can fish"!

View Fred Hargis's profile

Fred Hargis

4999 posts in 2519 days

#2 posted 05-05-2013 11:27 AM

Kickback may be correct, but I remember them being 10MM….one or the other should fit. Problem is you will liikely have to grind a regular wrench down (thickness) some to use, at least I think I did. Get a HF or other cheapie, it will be good enough.

-- Our village hasn't lost it's idiot, he was elected to congress.

View KevinSullivan's profile


12 posts in 2684 days

#3 posted 05-05-2013 05:29 PM

Well, ok, I figured it out. The size of the DC-380 planer jib nuts / knife screws requires a 3/8” wrench. The one that I had was indeed too thick to fit between blade/jib and head. A belt sander upside down in a vice did the trick. Thanks to those who responded. —Kevin

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