My previous planer was a Delta 15″ without bed rollers. I plan on getting a 20″ planer likely with a Byrd head. My question is- why are there bed rollers on these planers? I presume for less friction while feeding stock. However it seems that since the stock is supported above the bed surface that snipe is inevitable. The lenght of the infeed and outfeed tables is irrelevant. Are they really needed? How should they be set to elliminate snipe? Can they be lowered beneath table height? Do you have any experience with the Powermatic 20″ planer as to adjustability of these rollers?Thanks in advance for any advice.
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Replies
I believe that the table on the Powermatic is one large casting. there isn't a separately adjustable infeed and outfeed table. The tables are just there to give you a place to steady the stock for starting the feed and to reduce the leverage on the head when you've got a long overhang.
There's a small lever on the side of the in feed table that connects through a linkage to both table rollers. Using the lever, the rollers can be moved from fully retracted to being quite a bit above the table.
The rollers are there to reduce friction especially on the first passes on wet or roughsawn wood. You are correct in guessing that they can cause snipe, actually a reverse snipe, when the ends of the stock clear or climb on one of the rollers but that usually isn't important on the first few passes. Once the stock is cleaned up and feeding smoothly, the rollers are typically fully retracted, or left just a few thousandths of an inch proud if still needed.
John White
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