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SMT 17RWFDBX (120T) PDF https://store.shopping.yahoo.co.jp/happytools2006/smt-17rwfdbx-5metric.html#

https://www.ebay.com/itm/254793901545

Just bought a 27mm x 30mm 😜😝🤪

Breaker bar + digital torque adapter + ratchet adapter I use these two for anything over 130 ft-lb.:bounce:

torque = I*a = (mr^2)a I = moment of inertia a = angular acceleration m = mass r = radius When the mass is constant, the farther the mass is from the axis of rotation, the greater the moment of inertia.

I found this

You mean this? 130mm Length Probably made by the same manufacturer. And this => Astro Products(Japan) RH479

I think "Astro Pneumatic" is not the same as "Astro Products". Astro Products seems to be a Japanese retailer, I'm not sure.

BTW, I like stubby socket, too. :lol:

Since the cross-section area of the "Hex" is fixed, the strength of the hex bit socket cannot be increased by increasing the thickness. Yield strength can be increased by changing the material or different heat treatments. The catalogs of some brands provide torque data, such as EIGHT and KING...

Sometimes the hole is too big...

Just buy a digital torque adapter for torque testing. :cool:

The longest one is WIT 38SW400. More info. => Link (I can't read Japanese, just look at the pictures) The other two are no brand and are actually 1/4 non quick-release. I had to swap those ratchet heads because I want 3/8 head and the quick-release. The internal gears are of different widths...

Love quick-release, too. All my 3/8 swivel head ratchets are quick-release. Lengths are 6", 11" and 16".

Most of my hex bits are made of S2, a few are made of SCMV or HSS. Half of my hex keys are made of S2 or SNCM and the other half are CrV. For bit sockets, I think the key might be material hardness and yield strength.

Found this video, but there is only test data for chrome.

I don't know if the 10mm dia. will work?

I would also like to know the answer. I asked KING TONY before and they just repeat my questions without giving any answers.

I was looking for long handle ratchet as well. Finally, I found this 400mm long 3/8 roto head ratchet on Amazon jp. W.I.T. 38SW400 It's not quick release so I swap the head.

Open it, cut spring and lube.