Harrison M300 Gear Casing

Harrison M300 Gear Casing

This topic has 7 replies, 4 voices, and was last updated 30 August 2020 at 16:50 by larry phelan 1.

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28 August 2020 at 15:35 #14013
Len Morris 2
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@lenmorris2
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28 August 2020 at 15:35 #493195
Len Morris 2
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@lenmorris2
Hi Everybody,

When sorting out my Harrison M300 I needed to replace the power indicator light just above the E-stop. Needed to drill the hole larger for the new light. What a surprise! Would have sworn the casing was cast aluminium but it turned out to be some composite material. I thought it was fibreglass but a friend believed it was asbestos cement. Does anybody know what the casings are made of?
28 August 2020 at 16:31 #493209
RobCox
Participant
@robcox
I think mine is some flavour of glass fibre reinforced material. I had to drill out a hole in mine to accomodate a new stop switch. I used an hss drill bit and it had nice smooth rounded cutting faces after drilling a mm or so.

Rob
28 August 2020 at 16:50 #493214
larry phelan 1
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@larryphelan1
You learn something new every day !. I would have expected metal of some kind.
29 August 2020 at 13:38 #493341
Len Morris 2
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@lenmorris2
Hi Rob and Larry,

Used a Starrrat hole saw to drill my casing. Worked fine but the swarf it produced was very flaky and puzzling. The casing looks like metal, sounds like metal, and feels like metal but it's not. One thing for certain to come out of all this is don't bother to put an earth connection to it!
29 August 2020 at 15:32 #493349
Tim Stevens
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@timstevens64731
During the 39-45 war, even ships were made of concrete. By my grandad, incidentally.

Cheers, Tim
29 August 2020 at 15:32 #493350
Tim Stevens
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@timstevens64731
During the 39-45 war, even ships were made of concrete. By my grandad, incidentally.

Cheers, Tim

Why twice, I wonder … ?

Edited By Tim Stevens on 29/08/2020 15:33:31
30 August 2020 at 16:50 #493447
larry phelan 1
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@larryphelan1
Two different ships ?
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