Parallel adjustment on a King 15" Spiral Cutterhead Planer

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Forum topic by Thinkerf posted 10-29-2015 07:56 PM 659 views 0 times favorited 2 replies Add to Favorites Watch
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49 posts in 1797 days

10-29-2015 07:56 PM

Topic tags/keywords: planer

I purchased the King model KC-390FX 15” spiral head planer about 7 years ago and have bee very pleased with it’s performance. I decided to do an overall cleaning and cutter rotation before putting it to bed for the winter (my wife and I spend the winter in AZ), and decided to check the parallels between the worktable and the cutterhead. To my surprise (and dismay), there was about 60/1000” difference between the in-feed side and the out-feed side.
I referred to the manual for the method of adjustment and proceeded. What happened over the next two days was an absolute nightmare. Loosening the idler sprocket should have facilitated the easy removal of the chain from the corner sprockets allowing me to adjust those sprockets to bring the table back to parallel however there was not enough clearance between the sprocket teeth and the inside of the base casting to allow removal of the chain. The only way to get the chain off the sprocket was to remove the sprocket itself from the lead screw. To do this, you have to lift the planer off the stand about 1 1/2 inches. To do this you have to remove the 4 bolts (one on each corner), as well as loosen the motor hold down screws, remove the belts as well as the belt guard, and remove the stop/start switch box from the planer. I wound up cutting 4 hardwood blocks of equal length, placing them on each corner of the worktable and then snugging the table up until all four blocks were tight. I then used four clamps to hold the worktable and cutterhead tight together while I replaced the chain and snugged up the idler sprocket. At the end of the day I reduced the error down to 6/1000 and I was happy with that. I am writing this so that anybody else out there who may have the same planer will have a heads-up if they start into this process. I wrote King to tell them what had happened and to express my disappointment in their quality control.

2 replies so far

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5654 posts in 2808 days

#1 posted 10-29-2015 08:12 PM

Interesting. Usually people are concerned with side-to-side alignment issues, which would cause a tapered board. What type of defect were you seeing in the boards that made you investigate further?

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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49 posts in 1797 days

#2 posted 10-29-2015 08:58 PM

Although there was about a 5/1000” to 7/1000” difference from the left to right side on the in-feed side (out-feed side was good), I was not noticing any particular defect on my boards. What started this whole thing was when I had it apart to rotate the cutters I thought I would do a parallel check just to se if there was any miss-alignment and that’s when I noticed the big difference in in-feed to out-feed, the out-feed being about 60/1000” lower than the in-feed. When I read the manual and how to correct the error, it didn’t seem all that involved so I began the process. That’s when I discovered the manufacturing error and poor quality control with the head screw sockets being too close to the base casting to allow removal of the chain.

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