Any suggestions for an oval shaped mandrel for jump rings?
I wouldnt know where to buy one tho the jewellery tool suppliers
probably have them, If you want to make your own how you do this
depends on wether you have just a jewellers bench or have a full
sized mechanics workshop.
It will probably be easier for you to find some steel round rod with
the larger dia you need then file or grind it down into an oval,
either by hand or with an angle grinder.
Anything from a 4in nail upwards.
My preference is to put the rod in the propane forge and form the
oval hot on the anvil, then finish shaping on the linisher. but then
I have to have a fully equipped engineers workshop to back up what I
If youve not made oval jump rings before youll find having wound
them on the mandrel, they dont line up for you to cut through with
your saw. there always some 20deg out from each other.
It also depends on how many you need to make.
A final thought is, make the jump rings round then reform them to
the oval shape in a sliding horizontal concave oval shaped 2 part
press tool, would take several days to make, but when you had it
right then youd be in production of hundreds.
To give you an example of making the tools to make the item, i
needed to make 1000 round beads in silver a certain od size and int
Having sourced the drawn seamless tube, I then made a minature
circular saw bench using a 1/3rd hp motor, a 2in dia 15/1000in hss
circular saw blade, a rise and fall table with an adjustable side
Set it up, bees wax on the blade, tube against the fence push
through the running blade holding the cut piece with tweezers.
Repeat. Best part of a day to make the saw bench, then a mornings
work to cut the 1000.
Nest step was to form the cut lengths into beads. that required
making the tooling. Then polish them before assembly into rosary