Doing some leather forming to make a cup seal for a vintage water pump. Toss a few bucks into the hat: www.patreon.com/themadmailler PayPal donate: themadmaillerATyahooDOTcom
Old steam engineering manuals give formulas for sizing leather cups. I have made many. I had an old Dingley front end loader that used leather cups about 4 3/8 inch if I recall. Cobblers ( if you can find one } have pieces of leather that are a handy size for cups.
Thanks for sharing, inspired me to have a go with chinese 10 ton porta power seal on wedging attachment , still looking for a seal for it, any way cut out a leather washer shape ,put it on ,oiled and cupped by hand , fitted and its back working while i source a proper seal, hmmmm will see how it goes lol, cheers kirk
Does the cup have to be tight to the pipe or very close to the pipe diameter for it to effectively work? I am replacing a 2.5 inch cup and I am wondering if a 3 inch pipe would be a problem.
Just like my Silca bicycle pump from 1981 I rebuilt last night. It also uses a leather cup seal.
You are a crafts man . I have air rifle seal to make now and this all helps thanks . Bernie C
Old steam engineering manuals give formulas for sizing leather cups. I have made many. I had an old Dingley front end loader that used leather cups about 4 3/8 inch if I recall. Cobblers ( if you can find one } have pieces of leather that are a handy size for cups.
Very cool.... Thanks for that tutorial......I always wondered how those were made
Nice and inexpensive trick. I'll have to file this one in my bag of tricks. Thanks again.
Been missing your videos bro! Take care
Very simmilar to an older style airgun seal!
Nice work, that’s a lost art for sure...
Thanks for sharing, inspired me to have a go with chinese 10 ton porta power seal on wedging attachment , still looking for a seal for it, any way cut out a leather washer shape ,put it on ,oiled and cupped by hand , fitted and its back working while i source a proper seal, hmmmm will see how it goes lol, cheers kirk
I bet that will work great, especially as the leather soaks up oil and expands a bit.
Greetings from argentine!
Can remplace material? Leather for teflon or gum?
Does the cup have to be tight to the pipe or very close to the pipe diameter for it to effectively work? I am replacing a 2.5 inch cup and I am wondering if a 3 inch pipe would be a problem.
they should be the same size, with the pump leather being just a hair bigger to allow it to seal well.