Line boring early block

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Erik Barrett
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Line boring early block

Post by Erik Barrett » Sat Aug 03, 2019 8:20 pm

One of today’s projects. Main bearings on a 1909 block.
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C5250751-B0B5-40B4-B098-A3038D9144FD.jpeg

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Henry K. Lee
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Re: Line boring early block

Post by Henry K. Lee » Sat Aug 03, 2019 8:34 pm

That's an early Puppy Erik!'

Hank


modeltbarn
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Re: Line boring early block

Post by modeltbarn » Sat Aug 03, 2019 11:26 pm

Is that Mike's?


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Erik Barrett
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Re: Line boring early block

Post by Erik Barrett » Sun Aug 04, 2019 3:10 am

Yes it is an early one. Number is just over 5000. I know the owner as as Micheal.

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John Warren
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Re: Line boring early block

Post by John Warren » Sun Aug 04, 2019 8:25 am

Thanks for sharing Eric. Always great to hear from you.
24-28 TA race car, 26 Canadian touring, 25 Roadster pickup, 14 Roadster, and 11AB Maxwell runabout
Keep it simple and keep a good junk pile if you want to invent something :P


otrcman
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Re: Line boring early block

Post by otrcman » Sun Aug 04, 2019 10:01 am

Interesting picture, Erik. I've never actually seen a line boring operation, so maybe this is a dumb question (won't be my first ........ or last).

I notice that the block is not clamped down to the table. As a matter of fact, it appears to be sitting on a cushion of shop rags. So, what keeps the block aligned to the machine's drive during the boring operation ?

Thank you,

Dick

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NorthSouth
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Re: Line boring early block

Post by NorthSouth » Tue Aug 06, 2019 9:54 pm

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If I remember my lessons from Rumble Seat Garage, the above photographs show only the first stage of a finely tuned two jig boring process.


KimDobbins
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Re: Line boring early block

Post by KimDobbins » Tue Aug 06, 2019 10:44 pm

Erik, if you lay a standard crank in the bearing surfaces, how much wear if there? Or was the block previously babbited?


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Erik Barrett
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Re: Line boring early block

Post by Erik Barrett » Wed Aug 07, 2019 11:30 am

The block is clamped down through the cylinder bores. The rags are there to protect the deck surface from scratching. The mill drives the bar with a flexible coupling so perfect alignment is not required, but I get it close. This block has been opened up to use babbit on the upper main bearings. Originally it would have run the crank in the iron bores.

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