Your Recommendations for Machinist Straight Edge?

[giants]

I need a 24" machinist straight edge to check cylinder head and head gasket warpage in cars. The smallest warpage in one direction is .01" with a feeler gauge.

I'm open to ideas.

How about this one?

https://www.amazon.com/dp/B07H3DNNQP/?tag=atomicindus08-20

 

[uniballer]

Nothing comes up

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[xj31]

https://www.amazon.com/dp/B0002SQUVI/?tag=atomicindus08-20

 

[giants]

Nothing comes up

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Thanks. I clicked on the link in my post and works for me on Google Chrome.

 

[ericlar80]

Nothing comes up

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Try this:
https://www.amazon.com/Anodized-Tolerance-Straightness-Machinery-24/dp/B07H3DNNQP

 

[Lifeequalswork]

I got the starrett 24” rule and straight edge. Kind of pricey but worth the quality.

I used the straight edge first for straightening warped parts. Ended up switching to the 24” rule as it is slightly thinner. Will add part numbers when i get to my box at home.

 

[royesses]

https://www.mscdirect.com/browse/tn...gories#navid=12107792+4288156189&sortby=price

Sign up for an account to get a discount. I have the SPI 24" which is a decent compromise
of price and quality. It is more than accurate enough for checking heads and blocks.

Roy

 

[Git]

I have several straight edges that I use to set up my woodworking machines

Lee Valley - I mainly use their aluminum ones, but they also have them in steel

aluminum 0.003"
http://www.leevalley.com/en/wood/page.aspx?p=50074&cat=1,240,45313&ap=1

steel 0.0010"
http://www.leevalley.com/en/wood/page.aspx?p=56676&cat=1,240,45313&ap=1

Lee Valley has great customer service also:

Guarantee:
If, for any reason, you are not completely satisfied, just return your purchase within 3 months* by ground mail. You can choose to either exchange the product or receive a complete refund (including our regular shipping charges); we will also refund your return parcel post costs at the ground mail rate. Returns can also be processed at any of our retail store locations.

 

[matt_i]

Suburban Tool is a good name out of the MSC list. I have a few items from them and they seem of excellent quality.

 

[giants]

The distortion width for one measure is 0.01"

Is 0.001" enough for a straight edge, or should I go lower?

 

[Steve_P]

I've had the the central one for ~20 yrs and like it. I personally wouldn't want an aluminum one since I'm sliding steel feeler gauges under it. .001" flatness is enough for you

 

[Evilunclegrimace]

I bought a piece of precision ground stock from my machine shop supply house 30 years ago and it works just fine

 

[tarmy]

24” Starrett...straight edge...got it on Amazon. Once you get one...find a safe spot to store it to avoid moisture...and dings from other tools...

 

[tube_guy]

The Lee Valley steel straight edges are an absolute bargain. Very high quality, and made in Canada.

https://www.leevalley.com/en-ca/sho...d-measuring/56676-veritas-steel-straightedges

I've been using their longest one for years, and it's very straight. I would buy again if something ever happened to mine.

 

[zmotorsports]

I've had my Snap-on 24" precision straight edge for about 25 years now. Came in a nice plastic protective soft case. I'm not sure if they still offer them or not. I also bought a used 18" Starrett about 8 years or so ago but had to take some 0000 steel wool to it to clean it up a bit. Seems to be straight though.

 

[BillK]

The distortion width for one measure is 0.01"

Not sure what you mean by this ? .01" is almost 1/8" ????? Maybe .001" "

Is 0.001" enough for a straight edge, or should I go lower?

Realistically that should be fine. Goodson has them and so does Snap On. Don't skimp on one of the off brand ones. Also, once you have it find a place to hang it safely. Never lay it down.

 

[tdkkart]

No, 1/8" is 2 little marks past the big mark.

 

[larry_g]

Not sure what you mean by this ? .01" is almost 1/8" ????? Maybe .001" "

Bill, you know better... 1/8 =.125 not .0125.

That said .010" variance for a straight edge may work for rough carpentry but not for heads and engine blocks.

For the OP, Are you checking something you just pulled apart, are you the machinist machining the parts, or are you doing the Q.C. after machining? That will dictate the accuracy of the straight edge required.

lg
no neat sig line

 

[giants]

Bill, you know better... 1/8 =.125 not .0125.

That said .010" variance for a straight edge may work for rough carpentry but not for heads and engine blocks.

For the OP, Are you checking something you just pulled apart, are you the machinist machining the parts, or are you doing the Q.C. after machining? That will dictate the accuracy of the straight edge required.

lg
no neat sig line

I'm trying to measure warp in car engine cylinder heads and blocks.