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1-15/32 open end wrench?

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NoahG

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I’m moving a three axis CNC table and it has some odd sizes on its leveling feet. The hex on the foot pad itself is measuring at 1-3/8” , but the locknut is coming in consistently at 1-59/128, so 1-15/32”. Is this a wrench size available anywhere? The rest of the machine has standard hardware holding it together, so I doubt it’s Metric. I’ll no doubt settle on tightening that lock nut with a 12” adjustable, but I’m just intrigued by such an odd size.
 

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midshipmen89

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It's probably a 1-7/16" nut, which is a standard size for a 7/8" stud. It's good practice to have adjacent fasteners, like a jam nut and a hex on a leveling foot, be different sizes to avoid needing two identical wrenches to tighten things down. In this case, I wouldn't be suprised if this was intentional, and your 1-59/128" measurement is reading a strong 1/32" large due to deformation, burrs, corrosion, or similar. Special applications aside, I'm not familiar with wrench sizes by 1/32" above ignition wrenches. Once you cross about the 1" size, close enough is usually close enough.

Having said that, a pair of adjustable wrenches is likely what the installation crew used when the bed was originally leveled, and almost certainly the most efficient way to do this sort of thing. When I'm crawling around under a truck or a piece of gear I'm unfamiliar with or may use oddball/grab bag fasteners, a couple adjustables saves me a lot of trips back to the toolbox.
 
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cannuck

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that comes out to 37mm, but don't think that size or 1 15/32 exists. Probably just a sloppy 1 1/2 nut. Maybe look at BSW???
 
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RTM

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I hate trying to get one adjustable on most leveling legs on appliances, prefer stamped steel tools. Tho with this being a table, might be easier access.
 
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oldschoolcraft

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1 15/32 is 37.3mm

1 7/16 = 36.5mm
1 1/2 = 38.1mm

So 37mm will not be exactly halfway between them. it will be much closer to 1 7/16".

Then again, you said it was 1-59/128" measured, which is 37.1mm

I think we all got focused on trying to help you find a 1 15/32" wrench instead of doing the conversion of what you actually measured. So yeah... 37mm will be absolutely perfect since you're at 37.1mm

Here's a screenshot of the Proto catalog, page 583 of the 2024 PDF catalog:

37 wrench.png

This is the Proto 37mm wrench on Zoro for $50:

www.zoro.com

Proto Service Wrench, Satin, 7-5/8 In, 37mm J3537M | Zoro

Order Proto Service Wrench, Satin, 7-5/8 In, 37mm, J3537M at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.
www.zoro.com www.zoro.com

The proto has a listed head thickness of 9/32" or 0.28"

The Tekton wrench is $44
www.tekton.com

37 mm 12-Point Combination Wrench | TEKTON | WCB24037

Jumbo 37 mm (Metric) Combination Wrench with a 12-point box offset to 15-degrees.
www.tekton.com www.tekton.com

The proto wrench is 0.57" thick which is twice as thick as the Proto.

tekton specs.png

The proto wrench is Made in the US, the Tekton is made in China. If you get a 20% off Coupon at Zoro when comparing the Proto to Tekton, they will be the same price (about $40) after Tekton 10% rewards.

I would have guessed the Tekton might have been half the price and suggested grinding the tip down, but that doesnt appear to be the case.

If you're not familiar with Zoro they offer 20% off coupons regularly, I would post in this thread and ask someone to PM you one they aren't using. Free shipping at $50 threshold with Zoro so you'll find some filler item to add for free ship:

Zoro Deals Thread
 
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OP
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NoahG

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Hmm, good point about that being within tolerance to 37mm.
Even with MickeyCarr shipping, its $4 less than Zero and I’ll have it Friday morning. 👍
 

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oldschoolcraft

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NoahG said:
Hmm, good point about that being within tolerance to 37mm.
Even with MickeyCarr shipping, its $4 less than Zero and I’ll have it Friday morning. 👍
Click to expand...
If you had a 20% off coupon it would be cheaper on Zoro and the Proto is made in the US, but... it sounds like you're going to be leveling your table once and never using this tool again.

Actually, what I'd try doing, is use an air wedge shim, lift the table up slightly so I could fit an adjustable wrench on it, twist it a few times, deflate the air wedge check the level, and repeat as necessary. You won't be able to get it perfect the first time, but probably 4 or 5 iterations and you're done.

Maybe my suggestion is ridiculous, I dont know how big this table is, maybe it weighs 4000 pounds, maybe there's no room to slide the air shim under.

Something like one of these:

 
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BTL-A4

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It would help if you set your calipers to read in decimal inches and not fractions. If it reads to the nearest 1/128", that's about 0.008", which is a bit sloppy. Machining tolerances are usually about half that.

I got 37mm as well. I also second using an adjustable wrench for this; that's what they are for.
 
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Tostal

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The Emerald Isle
cannuck said:
that comes out to 37mm, but don't think that size or 1 15/32 exists. Probably just a sloppy 1 1/2 nut. Maybe look at BSW???
Click to expand...
1.438" = 1 7/16"AF ; 1.500" = 1 1/2" ; 1.480" =7/8" Whitworth or 1" BSF (1.480" = 37.592 = 37.3mm plus a coating of dirt ;)).

And no, I'm not suggesting OP buys an old Whitworth wrench, 1 1/2" or a large adjustable should do just fine for this application.
 
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ChevyEFI

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Phoenix, AZ
oldschoolcraft said:
Actually, what I'd try doing, is use an air wedge shim, lift the table up slightly so I could fit an adjustable wrench on it, twist it a few times, deflate the air wedge check the level, and repeat as necessary. You won't be able to get it perfect the first time, but probably 4 or 5 iterations and you're done.

Maybe my suggestion is ridiculous, I dont know how big this table is, maybe it weighs 4000 pounds, maybe there's no room to slide the air shim under.
Click to expand...
There's a 35% Zoro coupon on hydraulics in the deals section. Maybe a toe jack would be a better option.
 
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