really small failsafe (spring applied or permanent magnet) brake?

[bschena]

Does anyone out there know of any "subminiature" spring-applied or permanent-magnet failsafe brakes?

I'm looking for something to hold only about 0.04Nm (about 5.7 in-oz), and under 20-25mm diameter.

Thoughts? Leads?

Thanks,

Bruce

 

[israelkk]

Not so clear what you are after. Can you give more info about the application?

 

[MikeHalloran]

How many do you need?

Mike Halloran
Pembroke Pines, FL, USA

 

[bschena]

israelk: thanks for the reply. Permanent magnet or spring-applied failsafe brakes are pretty standard things. Very common on robot arms that have maintain their position even if the power fails - think "parking brake".

There are many manufacturers of larger sizes, but I'm on the hunt for a small one, which are much less common. Examples can be found in an old Puma-260, but there are no vendor markings. The only source I have found is the old Vernitron line now being built by Island Components.

MikeHalloran: I'm looking for a handful of prototypes right now, but am ultimately looking for a ISO supplier for volume production of 1000's of units for a surgical robot. Do you have any leads?

Alternatively, I'm considering designing the unit myself if I have to, in order to get the size I require.

Thanks!

-Bruce

 

[sreid]

The smallest I see from Ogura seems to be 40 mm but they may have smaller special units.

http://www.ogura-clutch.com/#