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Author Topic: what size screws for motor mount ?  (Read 2384 times)

Mike0001

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what size screws for motor mount ?
« on: May 27, 2015, 09:45:37 am »

hi

got to stage of mounting motor but this did not come with the screws.

What size screws do I buy .... its the ones that screw directly into motor ( 2 of )

its for my pilot boat and runabout re540/1 motor

thanks again
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malcolmfrary

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Re: what size screws for motor mount ?
« Reply #1 on: May 27, 2015, 10:03:14 am »

What size of motor?
Length is important too, the armature windings don't like being rubbed against by the pointy end of the mounting screw.
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Mike0001

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Re: what size screws for motor mount ?
« Reply #2 on: May 27, 2015, 10:05:16 am »

just edited it Malcolm you're too quick for me  :-)) mfa motor



motor has on it 719RE540/1
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John W E

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U-33

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Re: what size screws for motor mount ?
« Reply #4 on: May 27, 2015, 11:51:50 am »

And buy an extra set, you're bound to drop one screw when you go to fit them. Been there, done that...sworn a lot.  %)
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Rich

K-157 Vepr. Akula-II (project 971U)
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Mike0001

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Re: what size screws for motor mount ?
« Reply #5 on: May 27, 2015, 12:56:22 pm »

thanks for link


not sure on clearance on these motors but do you think 6mm length is ok ?
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david48

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Re: what size screws for motor mount ?
« Reply #6 on: May 27, 2015, 01:57:18 pm »

About your bolt length ,try and work out the depth of thread in the motor case then add a thread length ,my method would be , thickness of bracket +thickness of motor case + 1thread ,if you like you could add a shake proof washer under the head of the bolt ,the thread sticking out of the nut is not doing anything .
David
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plug

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Re: what size screws for motor mount ?
« Reply #7 on: May 27, 2015, 03:59:12 pm »

I might have some Mike, they will need shortening probably and are allen keyheads but you're welcome to them

regards Jack.
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John W E

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Re: what size screws for motor mount ?
« Reply #8 on: May 27, 2015, 05:36:51 pm »

Hi ya Mike

Can you tell us what motor mount you are using?

I have had a quick look at your last postings and I see you have been building the Pilot boat.   Is this the model which the screws and motor mount are for?  if so, it looks as though it may only be a 1mm motor mount?  In which case, the length of screws you would require would be about 4mm, given that you would require a plain washer + a locking washer, which would be okay.   This is because you have about 2mm clearance between the armature and casing.

aye
john
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Mike0001

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Re: what size screws for motor mount ?
« Reply #9 on: May 27, 2015, 06:33:44 pm »

hi

yes its for the pilot boat and a gentlemans runabout I am building same motor and same thin plated mount for both boats

http://i974.photobucket.com/albums/ae228/INEEDMOREPICS/PICT0234_zps099f8e53.jpg
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unbuiltnautilus

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Re: what size screws for motor mount ?
« Reply #10 on: May 28, 2015, 09:27:04 am »

M3 x 6mm supplied by MFA when they sell motor and mount together..just measured one :-))
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