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/diy/ - Do-It-Yourself - Tensioner pulley or something else??

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File: needs a tensioner.jpg-(52 KB, 880x413)
Tensioner pulley or something...
Tensioner pulley or something else?? Anonymous 04/24/14(Thu)10:52 UTC+1 No.629130 Report

Hey /diy/

So I'm working on a project where I need to add and release tension to a V belt drive and was hoping not to use and idler/ tensioner pulley.
I was thinking of just having some kind of small hand wheel that will adjust a range of 100mm (on the pic, the two highlighted faces from 50mm to 150mm apart). Does anyone know of any off the shelf products that would do it with a bit of modification?

Will post a few pics to help understand what I'm on about.
Anonymous 04/24/14(Thu)10:53 UTC+1 No.629132 Report

Oh yeah its for a pedestal drill
Anonymous 04/24/14(Thu)14:11 UTC+1 No.629163 Report
File: tension.jpg-(87x125)
the motor on my metal cutting...
the motor on my metal cutting band saw is mounted on a platform that pivots. the platform height (and belt tension) is adjusted by how far you screw in a bolt between the platform and its base.

see if you can put a hinge on the motor mount
Anonymous 04/24/14(Thu)14:24 UTC+1 No.629167 Report

I had thought about something along those lines but was worried that if the motor was just connected to the bracket by a hinge that it wouldn't be sturdy and rigid.... but you band saw is set up like this and works with no worries?
Anonymous 04/24/14(Thu)14:29 UTC+1 No.629168 Report

just put it on a door hinge
Anonymous 04/24/14(Thu)14:30 UTC+1 No.629170 Report

no problems, but if i were designing it from scratch i'd put the bolt on the other side and have it pull the unhinged ends together rather than push them apart
Anonymous 04/24/14(Thu)17:17 UTC+1 No.629207 Report

Yeah that seems like a much easier option than what I had come up with because I would have to stabilise the motor bracket more....
Anonymous 04/24/14(Thu)22:59 UTC+1 No.629317 Report

> pedestal drill.jpg
Put a strong push spring between the larger parts of the arm and around the smaller part at the double arrow <---> where it says "tensoner of some sort" (sic)
The spring will be pushing against the belt at all times. Bonus: automatic adjustment when changing speeds.
Anonymous 04/24/14(Thu)23:12 UTC+1 No.629327 Report

Hinged motors go back many decades, work very well, facilitate easy motor swapout, and you can use an adjusting bolt to add tension if needed.

If you ever need to use the belt as a clutch by loading and unloading it that same mount can do that for you. Riding lawnmower blade and drive systems operate on that principle.
Anonymous 04/25/14(Fri)05:27 UTC+1 No.629478 Report

Thanks for the ideas guys, much appreciated.
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