Mark Hennebury
06-24-2020, 11:40 AM
435643Hi, So am rebuilding a woodworking machine that has an air over oil feed cylinder, Air is the power, oil is the control.
So on the rod side of the cylinder is the air line and fitting, on the other end is the oil line and fitting.
Both fittings are for push-in tubes, BSPP thread (British Standard Pipe Parallel) with an o-ring boss seal.
The confusion is that the holes that they go into are tapered thread! R3/8" which is BSPT ( British Standard Pipe Taper)
The o-rings have been removed from the fittings and thread sealant has been put on the threads and in the o-ring groove.
Seems to have been done at the factory like this and has lasted 40 years. I have another machine and it appears to be done the same way.
Seems to be a strange way to do things.
Anyone have any idea why it would be done this way?
435641 435642
So on the rod side of the cylinder is the air line and fitting, on the other end is the oil line and fitting.
Both fittings are for push-in tubes, BSPP thread (British Standard Pipe Parallel) with an o-ring boss seal.
The confusion is that the holes that they go into are tapered thread! R3/8" which is BSPT ( British Standard Pipe Taper)
The o-rings have been removed from the fittings and thread sealant has been put on the threads and in the o-ring groove.
Seems to have been done at the factory like this and has lasted 40 years. I have another machine and it appears to be done the same way.
Seems to be a strange way to do things.
Anyone have any idea why it would be done this way?
435641 435642