Visit our Twitter feed for more great content
MGExp

MGA Forum

Nut, crank dog

Moss Motors
AutoShrine Sponsor
AutoShrine Sponsor
AutoShrine Sponsor
AutoShrine Sponsor

mgaex189 Avatar
mgaex189 Gold Member Giovanni Delicio
Obrigheim, Rheinpfalz, Germany   DEU
1955 MG MGA 1500 "C2"
1955 MG MGA 1500 "4-seater"
1955 MG MGA 1500 "C1"
1960 MG MGA 1600 Coupe    & more
Hi,

for those people using double pulleys on their crank, I have the correct crank dog nut with extended thread !

on the left you may see the original, on right the modified !!

Let me know if you're interested.

Gio

. Hide banner ads & support this website by becoming a > Gold Supporting Member <

Attachments:
20190207_165945.jpg    11.3 KB
20190207_165945.jpg

dominic-ch Dominic Clancy
zurich, zurich, Switzerland   CHE
Gio did this for my Judson setup, dropped it off on Friday, and it is a perfect fit for length and for the hand crank

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
I found that the thread was a bit oddball when I had to get a custom bolt to hold the Twin Cam nose on a pushrod crank.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

. Hide banner ads & support this website by becoming a > Gold Supporting Member <
mgaex189 Avatar
mgaex189 Gold Member Giovanni Delicio
Obrigheim, Rheinpfalz, Germany   DEU
1955 MG MGA 1500 "C2"
1955 MG MGA 1500 "4-seater"
1955 MG MGA 1500 "C1"
1960 MG MGA 1600 Coupe    & more
Hi Bill,

the thread was done with a lathe by an old man (84yrs.)

He worked all his life with such machines thumbs up


Gio

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Looked it up - the bolt is 5/8" and the thread is 16 tpi.
Standard for that is 11 tpi (coarse) and 18 tpi (fine). Oddball but fortunately not unavailable on special order.

In my case, I was having a special bolt made up and leaving the crank threads alone, so it wasn't a problem to set the lathe correctly for the bolt. I recall the machinist saying that he'd didn't recall anything else in that saize with the oddball thread. Makes you wonder how this arose as it isn't a simple size/thread used in Whitworth, BA, BSF etc.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

mgaex189 Avatar
mgaex189 Gold Member Giovanni Delicio
Obrigheim, Rheinpfalz, Germany   DEU
1955 MG MGA 1500 "C2"
1955 MG MGA 1500 "4-seater"
1955 MG MGA 1500 "C1"
1960 MG MGA 1600 Coupe    & more
I bought an original bolt and used it as sample. You're right, it's 5/8" and the thread is 16 tpi.

Now that we have all dimensions, it will be an easier job to do more. But still some hours to do the hexagonal head and the "accomodation" for the hand crank hot smiley

Gio

. Hide banner ads & support this website by becoming a > Gold Supporting Member <

To add your reply, or post your own questions




Registration is FREE and takes less than a minute!


Having trouble posting or changing forum settings?
Read the Forum Help (FAQ) or contact the webmaster





Join The Club

Sign in to ask questions, share photos, and access all website features

Your Cars

1978 MG MGB

Text Size

Larger Smaller
Reset Save

Sponsor Links