today's work

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

Taking us to school, thanks David.

Will Rogers
SSB659

Automotive fillers, putties, primers and paints are our friends!

Just passing on what I learned from others.

David

[SSBN659]

Taking us to school, thanks David.

Will Rogers
SSB659

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

The drill bit pictured in post #1688, is it the size of the O-ring? Was there any mod done to the drill bit before using it?

To render a non-interference fit to the raw castings .062" bore -- created by the brass rod core during the casting operation -- it is hand reamed with a standard (non-modified) .065" bit.

The two encapsulated O-rings, within the seal body, have a nominal .060" inside diameter, but those surfaces (being much more elastic than the surrounding resin) scoot out of the way when reaming with the over-size bit. This leaves the resin bore enlarged enough to easily pass the pushrod, with the O-rings projecting into the bore enough to girdle and make watertight the fit between pushrod and seal body.

David

[george]

The drill bit pictured in post #1688, is it the size of the O-ring? Was there any mod done to the drill bit before using it?

[He Who Shall Not Be Named]

[george]

Ah, Thank You for your reply and educational lessons, Master Sir.

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

Sorry, not sure of what I am looking at in the last five pictures. Multiple pushrod seals? But looks like a lot on one shaft for multiple casting????

Yes. And yes.

It's easier to use one long brass rod core than a bunch of short cores. The current tool has three ten-seal castings, and two eight-seal castings. After casting each core rod is pulled and the individual pushrod seals separated on the bandsaw.

Here's the less efficient 'old-school' pushrod seal tool and casting -- too labor intensive.






David