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[4]

Playtime With Teflon, A Seal Installer

January Project of the Month [3]
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Ulma Doctor

Infinitely Curious
H-M Supporter-Premium Member
Joined
Feb 2, 2013
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#1
I work on many pieces of equipment that frequently need seals installed due to an extreme climate they somehow survive in.
One seal in particular more than others, a 25x62x10
the problem with this seal is that is mounted to a shaft, then the seal is driven into it's bore,
but it has to be driven over the end of the shaft that is larger than the seals ID- creating some issues...
in the 30 yrs of buying and making tools, i have only used comercially made seal installers maybe 3 or 4 times.
i have devised all kinds of ways of getting it done, but today i finally made a proper seal installer from items i had lying around in the shop.
namely, a reclaimed 6061 aluminum internally threaded standoff and a surplus teflon cylinder
the dimensions:
115mm tall x 62 mm diameter at the widest point , bored to 35mm id, stepping down to 25mm - about 1" from the striking head.
the striking head : 2"long x 1.50" at the widest, stepped to 1.00"
the head is kept in place by the 1"(25.4mm) head wedged firmly into a 25mm bore.


the pictures:
2016-10-11.jpg

my shenwai and a cemented rounded carbide bit did some beautiful work on the aluminum, a mirror like finish!
the teflon was roughed with an un-coated TNMG insert, then finished with the same rounded cemented carbide that i used for the aluminum
i chamfered all corners with a 45* hand ground HSS tool

2016-10-11.jpg

and the installer with the intended seal to be installed!
this teflon installer will not damage the most frail of seal

as always,
thanks for reading and looking :grin:
 
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