Gallery, Projects and General > How to's

Square Bolts

(1/5) > >>

Gerhard Olivier:
Please I need some ideas

With the wood engine I need a lot of Square nuts that have that destinct old fasioned look.
any ideas on how to make a lot of those would be very helpfull.

They would need to be metric M2.5 or M3  sizes

The things I dont know is how big would the square part need to be?
How thick would the nut need to be?

Do you make them from square stock or would round be easier???



Any help would be good thanks

Gerhard

Jasonb:
If you can get sq stock the right size then that would be quicker. You may also find that holding it in a splt bush which is bored to the accross corners distance easier than the 4-jaw as even when just using the same too screws the work can drift off centre after a few resets.

For M3 I should think 5 to 5.5mm square would look about right and maybe 1.5 to 2mm thick. At the time your engine would have been made its unlikely there were any standard thread forms in use as its pre Mr Whitworths time so go by what looks right. Teh nuts would be completely flat on the side against the casting/timber and have a slight chamfer on the other.

I think I have seen square headed stuff for sale, may have been on eof the german suppliers, I'll have a look later.

Jason

krv3000:
HI dont no if this helps but old mecarno has sq nuts

mklotz:
The rules of thumb I use...

Scale fastener dimensions

D = bolt major diameter
Across flats dimension of bolt hex head and matching nut = 1.5*D
Bolt head thickness = 0.7*D
Nut thickness = 0.9*D

Hex head is implied but I see no reason why they wouldn't be applicable to square.  They suggest that a 4.5 mm AF nut with a thickness of 2.7 mm would be about right for a 3 mm stud/bolt.

Gerhard Olivier:
Thanks for the stats chaps

I tried a bit of square bar 6mm in a bushing that I cut in half - in the 3 jaw chuck but it slipped and would not drill
Then I tried in the ER collect - a bit better but still slipped.  This is steel I got from B&Q probably cold rold stuff????

Will have to use the 4 jaw ( it is 5 inch diam ) and I find it a bit scary!!!

OR I could make 5-6 at a time out out brass round and just just part after I have cut the square edges ( I only have acces to round and sheet brass) If I leave a roung end to grip on I could re-chuck and part them easily enough

Will have to experiment a bit

Gerhard

Navigation

[0] Message Index

[#] Next page