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#1
10-01-12, 11:46
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EN24T and 4340 are both chromium nickel molybdenum, 4140 being closer to EN19.
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Adrian Barrell 
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#2
10-01-12, 12:36
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can it still be turned without special tools on the lathe ?
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is mos redintegro __5th Div___46th Div__ 1942 Ford Universal Carrier No.3 MkI* Lower Hull No. 10131 War Department CT54508 (SOLD) 1944 Ford Universal Carrier MkII* (under restoration). 1944 Morris C8 radio body (under restoration).
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#3
10-01-12, 12:39
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Are you using HSS or carbide tips? Tipped tools have no problems, HSS is ok if you keep an eye on your speeds and feeds.
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Adrian Barrell
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#4
10-01-12, 12:45
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no idea not my lathe...will ask the lad Adrian... cheers
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is mos redintegro __5th Div___46th Div__ 1942 Ford Universal Carrier No.3 MkI* Lower Hull No. 10131 War Department CT54508 (SOLD) 1944 Ford Universal Carrier MkII* (under restoration). 1944 Morris C8 radio body (under restoration).
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#5
11-01-12, 06:56
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Richard / Adrian
To pose the question a little differently, Are the cutting tips on the tools separate, as in clamped into the holder (Not the tool post holder) Commonly a triangle shape, that can be turned over, and around to give six cutting edges?
Thanks Adrian for your conversion.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions....
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#6
11-01-12, 17:43
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got the bar today.. such a nice piece of steel ! seems a shame it chuck it in a lathe... will keep you updated with how it turns out ! fingers crossed the HSS bits will cut it without it killing them off...
finally managed to get the cam plate fully out today... just a quick question.. the two caps that are on the cam plate (which go around the axle) do these bolt up solid to the axle or does the axle slide/pass through them ?
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is mos redintegro __5th Div___46th Div__ 1942 Ford Universal Carrier No.3 MkI* Lower Hull No. 10131 War Department CT54508 (SOLD) 1944 Ford Universal Carrier MkII* (under restoration). 1944 Morris C8 radio body (under restoration). Last edited by RichardT10829; 11-01-12 at 18:03.
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#7
11-01-12, 19:23
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welding AP
Hi Guys,
the welding of armour plate was pioneered by Guy Motors, they proved that it could be done along with substantial saving of time and materials. The process they developed was then handed to the War Dept., gratis. Imagine a company doing that today. Rivets look good, and if one knows how much work there is in each rivet, even little ones, the appreciation factor registers much higher. As has been pointed out, any decent-sized projectile hitting a rivetted or welded hull may make life for those inside rather grim. Cheers, Dave
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