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A versatile and precise miter sled

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Forum topic by StevenWoodward posted 02-27-2021 01:06 AM 485 views 0 times favorited 11 replies Add to Favorites Watch
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StevenWoodward

58 posts in 247 days


02-27-2021 01:06 AM

My old sleds did not fit on new table saw, so I gave my old sleds to the guy who bought the old saw, and set out to make new sleds. Did some research on best practices in table saw sled construction, and found some great ideas that were new to me, and also came up with some ideas of my own. But I did not find an instruction that pulled together all the great ideas. Therefore made this video showing how to make a versatile and precise miter sled. https://youtu.be/yJbVyA8rqYA

Some ideas incorporated in this design are:

1. Used a single UHMW runner. Found this to be just as good as the two runner sleds that I have always made. An advantage of a single runner is that changes in humidity that affect the dimension of the base will not cause the runners to bind in slots. A single runner does require a snug fit in the mitre slot.

2. Make a perfect right angle triangle of MDF, to be glued to the base, and then use that as a guide to set the fences perfectly. Orient the MDF triangle for perfect 45 degree cuts using a new method shown in the video.

3. Threaded inserts in the miter fences, allow auxiliary fences to be bolted on. Long auxiliary fences for long pieces, and special auxiliary fences for making precise picture frames without measuring.


11 replies so far

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BuckeyeDennis

105 posts in 756 days


#1 posted 02-27-2021 04:46 AM

Good thinking, and good technique. Nothing left to chance.

-- Dennis 'We are all faced with a series of great opportunities, brilliantly disguised as impossible situations.' Charles Swindoll

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tvrgeek

1778 posts in 2706 days


#2 posted 02-27-2021 10:43 AM

Most excellent. As I have a new saw, my next project. Solves several problems I had with using a miter saw.

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tvrgeek

1778 posts in 2706 days


#3 posted 02-27-2021 11:09 AM

One thing I noticed, I need a better dial indicator. Mine is a cheap HF and it bounces all around when you turn the dial. Brands reasonably priced would be appreciated.

One thing I noticed is the alignment instructions for my saw were lacking at best. I set my front fence rails with a depth mic off the table. I then used a pit of thin card to tune the rear guide height across the table. Took for ever, but well worth it.

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StevenWoodward

58 posts in 247 days


#4 posted 02-27-2021 12:06 PM



One thing I noticed, I need a better dial indicator. Mine is a cheap HF and it bounces all around when you turn the dial. Brands reasonably priced would be appreciated.
- tvrgeek

Mitutoyo makes high quality measurement instruments. They are priced accordingly but can be found at good discounts by shopping around. I waited for a short term price drop on Amazon to get mine. Keepa.com is an Amazon price tracker that can be set up to send alerts when the price of a specific item drops.

This is the dial indicator that I have: Amazon

View AMZ's profile

AMZ

301 posts in 446 days


#5 posted 02-27-2021 12:31 PM

Several comments: first, I fully agree with the single runner, along with the use of UHMW material. I used an aluminum bar, with expansion plugs for a tight fit. Also, your comment about Mititoyo is spot on. I own a manufacturing plant, with a supporting machine shop, and the top three inspection tool makers are Starrett, Brown & Sharp and Mititoyo. The last two are the equal of the first, but often available at a lower cost.

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Bstrom

341 posts in 230 days


#6 posted 02-27-2021 12:38 PM

That is the most thorough tutorial on making a jig I have ever seen – enormously informative and accommodates any metering one would need. Many thanks for your huge effort to solve all the problems we would have in accomplishing this task.

-- Bstrom

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tvrgeek

1778 posts in 2706 days


#7 posted 02-27-2021 12:59 PM

Decided to risk a cheaper one, but with free Prime return. If is balky, then a Mititoyo it will be

Believe it or not, I have a couple Starrett tools and am not that enamored with them. Good, durable, but somehow I expect more for the price.

Anyone use Delrin for the runners? Very stable. ( very expensive)

OK, coffee finally ready. My old maker decided to fail this morning so I had to drag out my big one. Bummer as I liked it, but I guess 20 or so years of daily use may be about it for disposable countertop appliances.

Made my ZCI s for my new saw, so 90 degree sled and clamp on supports are next. Then the 45 sled. I too have watched dozens of sled videos and Steven’s are about the best overall thought out. Probably some T-track as for some reason, I am often dealing with very small pieces and need hold-downs. I was also thinking about adding some Formica skids on the bottom for even slicker sliding. Maybe some PTFE tape. Have an idea for a magnetic top cover for mostly dust collection.

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RClark

117 posts in 3242 days


#8 posted 02-27-2021 01:08 PM

Thanks. I appreciate the time you took to do the video.

I have a “decent” crosscut sled now, but I definitely want to add specialized sleds for things such as miters.

I also need to “up my game” on accuracy, and you showed a lot of the attention to detail that helps me understand how to do that.

-- Ray

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StevenWoodward

58 posts in 247 days


#9 posted 02-28-2021 01:36 AM



One thing I noticed, I need a better dial indicator. Mine is a cheap HF and it bounces all around when you turn the dial. Brands reasonably priced would be appreciated.
- tvrgeek

Forgot to mention: Fake Mitutoyo are common, so best to buy from reputable dealer such as ITM. There are YouTube videos showing how to tell fake from real.

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tvrgeek

1778 posts in 2706 days


#10 posted 02-28-2021 01:51 AM

Now THAT is a reason to beat up the Chinese. Not Harbor Freight. I know you can’t trust Amazon for that kind of diligence.

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tvrgeek

1778 posts in 2706 days


#11 posted 02-28-2021 02:19 AM

Found the Y-tube from our crazy friend from the north (Bolter) on identifying and his usual destruction of the tool.
Seems most videos are for calipers, but no doubt, some slime is copying everything.

Wrong battery and no real signature on the cal record seems to be the most obvious. Amazon has an “official” store. They get $115 for the dial indicator, $120 and up for 6 inch calipers.

I have a couple $12 cheap crap calipers and the symptom of weak battery he describes is evident. When I want accuracy, I just pull out my old Vernier. No battery problem. They don’t seem to make a protractor. I bought a “General” which I assume is the same cheap chip.

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