LumberJocks

Push Block

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Project by Jeremy Greiner posted 02-01-2011 04:54 AM 2632 views 3 times favorited 7 comments Add to Favorites Watch

I finished this fence riding pushblock I found in wood magazine. When looking at the item in the magazine it looked like a good idea. In practice I’m not sure I like it to much.

The idea is you raise the left so the material can slide freely under it and once you get to the end of the stock the flip down stop drops down and you can then use the pushblock to push the rest of the way through.

When using it a few test times (with the saw off) I found that I couldn’t just insert the stock and lower the push block on top of it like a featherboard. Doing this caused the stock being cut to drag the pushblock with it as it was being pushed down the saw. I had to raise the pushblock slightly above the stock, then tighten the screws to allow for the stock to slide freely under the pushblock.

Because of this, there is no downword pressure to prevent it from sliding away from the fence easily. On a 12’’ board I tested with the pushblock there was a 1/32nd of a deflection (one side was 1/32nd wider than the other) caused by the pushblock (Yes I double checked to make sure it wasn’t the fence, it has some deflection but it was only .003 of an inch, which is high by magazine rating standards I just haven’t tweaked my fence enough I guess)

Because the pushblock rides along the top of the fence, it doesn’t allow for vertical featherboards, or board buddies if you have them.

I dunno, maybe I’m doing it wrong but I’m not much of a fan of this pushblock.

On the bright side, I got a nice MDF template of a handle I can reuse!

-jeremy

-- Easy to use end grain cutting board designer: http://www.1024studios.com/cuttingboard.html





7 comments so far

View cabmaker's profile

cabmaker

1311 posts in 1464 days


#1 posted 02-01-2011 05:01 AM

Looks sorta spooky to me. You might oughta shelf that one but you get an A for effort. I have known people to injure themselves by trying to overkill things like that. You gotta watch those magazines as they continue trying to reinvent the wheel.

View Wolffarmer's profile

Wolffarmer

393 posts in 1893 days


#2 posted 02-01-2011 06:23 AM

Heck of a lot fancier than the one I cobbled up last year

fence rider

Works ok for me. On longer pieces I keep it close by and slip it over the fence and finish the cut.

Randy

-- That was not wormy wood when I started working on it.

View jusfine's profile

jusfine

2280 posts in 1581 days


#3 posted 02-01-2011 09:15 PM

I think I would agree with you, it might not work safely the way it was designed, or they didn’t take some of the factors into consideration, such as a featherboard to keep the stock tight.

I’m still waiting for someone to invent a good one for my old unifence… :)

-- Randy "You are judged as much by the questions you ask as the answers you give..."

View Marty Backe's profile

Marty Backe

159 posts in 1427 days


#4 posted 02-03-2011 07:19 AM

justfine, have you seen this Peachtree upgrade for the Unifence. I haven’t bought it, but I’ve been thinking about it.

http://www.ttrackusa.com/unifence.htm

View Jack_T's profile

Jack_T

621 posts in 1686 days


#5 posted 02-16-2011 04:29 PM

Jeremy, you need to add a feather board to the table. The purpose of the featherboard is to hold the wood to the fence. The purpose of a push stick is to keep your hand away from the blade and in the case of this jig to also hold the wood to the table.

-- Jack T, John 3:16 "For God so loved the world that he gave his only Son, so that everyone who believes in him might not perish but might have eternal life."

View Jacob's profile

Jacob

85 posts in 1297 days


#6 posted 03-28-2011 01:44 AM

Just doesn’t seem to be as efficient or quick and handy as a traditional push stick, but it works on a novel little concept and it looks neat.

@ Wolffarmer, your fence rider has a very small pushing foot, but if it only pushes from the bottom right, the wood would veer off to the left into the blade if you wherent using a featherboard.

I guess a traditional push stick just seems faster and more adjustable to the width of the stock your ripping.

-- -Jacob Turetsky, Industrial Designer

View Wolffarmer's profile

Wolffarmer

393 posts in 1893 days


#7 posted 03-28-2011 01:55 AM

True, it is not perfect and I usually do use mine with a feather board or something to keep the stock towards the fence. I just find it a lot easier and feels safer to use that a push stick as i don’t have a hand pushing towards the blade, even if there is a stick between hand and blade.

Randy

-- That was not wormy wood when I started working on it.

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