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1/4-20 vs 5/16-18 t-bolts tracks and others, which is better?

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Forum topic by MiniMe posted 11-03-2019 03:29 PM 729 views 0 times favorited 10 replies Add to Favorites Watch
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MiniMe

140 posts in 587 days


11-03-2019 03:29 PM

I am seeing that Veritas in entrenched in using 5/16 while Kreg is using 1/4-20
There is a smart company (Magswitch) that built a track that has both type of slots

https://www.elitetools.ca/en/product/magswitch-workholding-system-universal-track-36/

Why the two options and which one is better?


10 replies so far

View MrRon's profile

MrRon

5767 posts in 3779 days


#1 posted 11-03-2019 05:01 PM

A 5/16 bolt is stronger than a 1/4 bolt, but as a track hold down, either is strong enough. I don’t see anyone using torque busting force to tighten.

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Andybb

2149 posts in 1139 days


#2 posted 11-03-2019 08:01 PM



A 5/16 bolt is stronger than a 1/4 bolt, but as a track hold down, either is strong enough. I don t see anyone using torque busting force to tighten.

- MrRon


+1
But what are you doing that you think you need that kind of torque?

-- Andy - Seattle USA

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MiniMe

140 posts in 587 days


#3 posted 11-04-2019 12:30 AM

Doing nothing but I am unclear on why one vendor chooses one size while the other uses the other
I think the 20 is a less coarse thread and if you need to adjust it allow finer adjustments

View Dark_Lightning's profile

Dark_Lightning

3636 posts in 3644 days


#4 posted 11-04-2019 03:27 AM

1/4-20 Vs 5/16-18 doesn’t change the tightening torque all that much. It’s probably a choice by the manufacturer to avoid having a product too similar to another’s.

-- Steven.......Random Orbital Nailer

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PaulDoug

2216 posts in 2239 days


#5 posted 11-04-2019 03:19 PM

Personally, I would go with 1/4”-20 is the more common used in jigs and fixtures, so that is what I would go with. I always have some of that size around so it I drop a nut or bolt, I can probably fix things without a trip to the store.

-- “We all die. The goal isn't to live forever; the goal is to create something that will.” - Chuck Palahniuk

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xeddog

257 posts in 3543 days


#6 posted 11-04-2019 04:49 PM

Two questions. Aren’t there some tracks that can use either? And even if you have track that takes 5/16 bolts, can’t you still use 1/4” in them too, possibly with the use of a washer?

View HokieKen's profile

HokieKen

11296 posts in 1674 days


#7 posted 11-04-2019 06:13 PM

Lots of T-track will use either 5/16 t-bolts, 1/4 t-bolts or 1/4 hex head bolts.

-- Kenny, SW VA, Go Hokies!!!

View Rick  Dennington's profile

Rick Dennington

6682 posts in 3730 days


#8 posted 11-04-2019 11:56 PM

I think the T tracks you get from Rockler uses either one. More than anything, I think it’s just personal preference.

-- " The secret to staying young looking.....hang around old people.." R.D.

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DrTebi

347 posts in 3802 days


#9 posted 11-05-2019 11:41 AM

From my experience, most things in woodworking are in 1/4-20. I decided to stick with that. It makes life easier, since you will only ever have to have one driver and one wrench for your screws and bolts. Well, maybe a couple of drivers, if you also use flat head 1/4-20 screws and occasionally larger nuts.

BTW: That’s one thing I really like about ShopSmith. They chose to use pretty much only one size of hex driver for all adjustments on every tool they made (with very few exceptions).

Personally, I hate looking for the right wrenches and drivers… it really pays off to stick with one size.

View gwilki's profile

gwilki

325 posts in 2009 days


#10 posted 11-05-2019 12:50 PM

Your original premise is mistaken. Lee Valley is not at all “entrenched” with 5/16. If you look on their site, you will see more options for 1/4” than for 5/16”. It’s your choice.

-- Grant Wilkinson, Ottawa ON

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