Cant reach a nut that is in a tight place, special tool needed?

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impression @impression

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Gepost: 18 okt. 2025

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Cant reach a nut that is in a tight place, special tool needed?

Hello,
I am trying to repair a wheelchair and to take the motor out.
it is a quickie 646SE

For a particular metal plate to be removed there are 4 bolts to remove. I removed one already with a box and a key so I know the tools have correct mesurement when there is space to manoeuver.

But one of the 4 nuts is placed in a corner and the key is kind of too fat to get get far enough around it to hold it while i turn the box. if fact it does not hold it at all.

What to do? Would i need another kind of key?

ps There is not place for the box on this side samething for the ring at the other end of the key.

Thanks

Beantwoord deze vraag Dit probleem heb ik ook

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Juan Garcia @uchetil Rep: 10,2k 191 11 46 · Answer 1 · 2025-10-18T20:25:55-07:00

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Juan Garcia @uchetil

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Gepost: 18 okt. 2025

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this is from carnewsbox,com where there is also a video going over the advantages and disadvantages of each of these vs, the others.

First I'd spray some WD-40 to get rid of the corrosion and maybe loosen it up.

Things that may work:

Use a vise-grip to hold the nut from turning while you use your socket wrench (in your photo) to remove it

If the metal frame next to the nut is solid enough, (It doesn't look to be though) wedging a large flat screwdriver between the nut and frame to hold the nut while you use your wrench as above. You just need the nut not to move while you use your socket on it, yes?

Destructive ways to remove the bolts:

grind the nut or head off if you can get a grinder at it.

a cold chisel to remove the nut.

Drill the bolt head out

Tools that may work :

A thin-wall 12 point socket, also available with an offset, which may be helpful.

A thin-wall 12 point box wrench might have enough clearance.

A thin-wall socket with a swivel or flex

A 12 point socket wrench (the type that is one-piece without the ratchet)

Good luck.

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HI what do the point stand for 12 or other numbers I imagine.

thanks

21 okt. 2025 door impression

@impression You can probably buy or borrow such tools locally, but if you are wondering what they are or look like this page https://www.mcmaster.com/products/tight-... has lots of such tools; I'm not recommending the company just giving you a place to see what the tools are and look like. The advantage to the 12 point box wrench is that it can work in a more restricted access, the thinner walled tools are both disadvantage (not as strong) and advantage (can fit places thicker tools can't. the more points the less access from the sides you must have to use it... the less part of a circle or 'arc' you must move the tool for it to achieve a new grip. Fewer 'points' mean more surface contact with the tool and the nut or bolt, the advantage being less risk of ''rounding' the head, but the bolt must turn farther before you can get a new grip (more arc). Hope that helps.

21 okt. 2025 door Juan Garcia

ok until hom many point can we go without instant deformation of walls?

thanks

22 okt. 2025 door impression

@impression I wouldn't worry about it, under normal use it's not a problem, You could break one by using a 'cheater' like using a pipe to give greater leverage on a bolt that was extremely tight or turned the wrong direction, but it's very hard to break your tools under normal use. It's more likely you would 'round' the nut or bolt if it's very tight or low quality by using higher points as I mentioned before because there is less metal contacting the nut, if you feel the wrench moving while the nut isn't, that might be the case, look at it, you can see whether that's happening, if it is then use a different tool, try penetrating oil or heating the nut, which may loosen it. a cheap tool, might break or deform yes, but that's always the case. It's a good idea to buy the best quality you can afford so they last. Some companies used to give lifetime warranties on their tools, it it broke you got a free replacement... I haven't seen that much theses days though. If it breaks they can sell another!

22 okt. 2025 door Juan Garcia

Ho wait I thought the 12 point thing was the thickness of the outside part of the box(like the thickness of the wall) .... Now i read that the points would make the fit tighter on the nut as if it would be smaller then the mesurement of the box. Could you clarify?

Also why are you saying that we can round a head if the box is too tight? I though rounding the heads happens when the box is not tight enough... or may by tight you meant immobile-rusted-frozen.

Thanks

22 okt. 2025 door impression

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