Day 38.
The Eccentric Strap.
The main problem here was not having a suitable tool to do the recess on the internal diameter. I did look on the internet and expected to find something like a parting tool set at 90 degrees but couldn't see anything. Could someone please tell me what I should have used and possibly where to get one (10mm shank) – I used the boring tool which was definitely not the thing to have done…. thanks.
The Eccentric Strap, Rod and Clevis Drawing.
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The Eccentric Strap Gunmetal casting as supplied.
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Facing the Eccentric Strap.
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Drilling the bolt holes in the Eccentric Strap, starting with the Centre Drill.
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The Eccentric Strap cut into two. My saw cut was not too good and so had to mill the joins back flat – resulting in loosing some excess material… I have a small slitting saw which I think I will try for doing this next time around.
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Tapping the Eccentric Strap bolt holes.
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Had to extend the 7BA bolts thread because of the lost material in the casting in having to mill flat the poor saw cut..
(the left one as supplied).
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The two half's of the Eccentric Strap bolted back together.
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Initial drilling of the Eccentric Strap bore, started at 3mm and used a drill bit up to 10mm.
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then over to boring to the final diameter..
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Checking the Eccentric Strap bore size 1.
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Doing the internal diameter recess on the Eccentric Strap. Used the boring tool which was a big mistake..
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Milling down the fixing arm for Eccentric Rod.
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Tidying up the Eccentric Strap on the mill.
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Drilling the Eccentric Strap Rod fixing holes.
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The finished Eccentric Strap.
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Regards
Allan.