simonl
23rd Jan 2018, 07:35 AM
As part of my hydraulic log splitter project i needed a fitting for the suction side of the pump. The pump uses UN (O) fittings on both the suction and pressure sides. UNO fittings use an o-ring to create a seal rather than rely on the thread, they dont seem to be very common but not unobtainable. The suction port has a 1-5/8" UNO fitting and i needed one that went to a 1-1/2" barb fitting to take the suction hose. These can be ordered through my local hydraulic supplier but at $65 for the fitting i figured id make it myself.
Ended up working really well. Being a 12 tpi thread on my metric lathe, as usual i left the half nuts engaged. I used a part off tool to make a run out groove which also served as the o-ring groove.
The o-ring seats in a groove on the female side and so the fitting seats hard onto the female compressing the o-ring a defjned amount.
The biggest issue was the material. I asked for and purchased a piece of 50mm MS bright but there is no way its MS. It was very tough, machined beautifully with tc tooling but was tough as all.
I also machined some flats to aid in tightening it on.
Anyway. Happy withvthe result and saved some coin.
Cheers.
Simonhttps://uploads.tapatalk-cdn.com/20180122/a6f7fd3bbc38b7054f5b12f2792d2690.jpghttps://uploads.tapatalk-cdn.com/20180122/54b46f945493319b1b763e25bda6046c.jpghttps://uploads.tapatalk-cdn.com/20180122/d766fa4b2f922226d08699eaf08e7519.jpghttps://uploads.tapatalk-cdn.com/20180122/6dcc7accb6540685979bc3a1f1127eb1.jpg
Sent from my SM-G900I using Tapatalk
Ended up working really well. Being a 12 tpi thread on my metric lathe, as usual i left the half nuts engaged. I used a part off tool to make a run out groove which also served as the o-ring groove.
The o-ring seats in a groove on the female side and so the fitting seats hard onto the female compressing the o-ring a defjned amount.
The biggest issue was the material. I asked for and purchased a piece of 50mm MS bright but there is no way its MS. It was very tough, machined beautifully with tc tooling but was tough as all.
I also machined some flats to aid in tightening it on.
Anyway. Happy withvthe result and saved some coin.
Cheers.
Simonhttps://uploads.tapatalk-cdn.com/20180122/a6f7fd3bbc38b7054f5b12f2792d2690.jpghttps://uploads.tapatalk-cdn.com/20180122/54b46f945493319b1b763e25bda6046c.jpghttps://uploads.tapatalk-cdn.com/20180122/d766fa4b2f922226d08699eaf08e7519.jpghttps://uploads.tapatalk-cdn.com/20180122/6dcc7accb6540685979bc3a1f1127eb1.jpg
Sent from my SM-G900I using Tapatalk