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As advirtised, Brass Flexible coupling.
What part is flexible exactly ??
What part is flexible exactly ??
Flexible Coupling,, Methinks Not !
- Thread starter MaxHeadRoom
- Start date
panic mode
- Joined Oct 10, 2011
- 4,864
the wrench...?
panic mode
- Joined Oct 10, 2011
- 4,864
and there seem to be plenty of brass and aluminum variants that are called that...
never knew it. this is what i am used to:
never knew it. this is what i am used to:
ZCochran98
- Joined Jul 24, 2018
- 351
Anything's flexible if you're strong enough.
Hello,
In this ebay add (found with google images) there is a contradiction:
https://www.ebay.co.uk/itm/195917903688
The title states:
Brass Flexible Shaft Coupling Rigid Coupler Motor Connector CNC 2/3/3.17/4/5/6mm
The desciption states:
Item description from the seller
Small rigid brass coupling top wire fixed drive shaft copper material coupling. Buy brass coupling we will send you a wrench + M3 screws x 4pcs. 2mm to 6mm. 6mm to 6mm. 3mm to 6mm. 4mm to 6mm. 5mm to 6mm.
Bertus
In this ebay add (found with google images) there is a contradiction:
https://www.ebay.co.uk/itm/195917903688
The title states:
Brass Flexible Shaft Coupling Rigid Coupler Motor Connector CNC 2/3/3.17/4/5/6mm
The desciption states:
Item description from the seller
Small rigid brass coupling top wire fixed drive shaft copper material coupling. Buy brass coupling we will send you a wrench + M3 screws x 4pcs. 2mm to 6mm. 6mm to 6mm. 3mm to 6mm. 4mm to 6mm. 5mm to 6mm.
Bertus
This is the ad "
Maybe their definition of "flexible" means it can be used in multiple applications.
panic mode
- Joined Oct 10, 2011
- 4,864
the purpose of the flexible coupling is to connect two shafts that are misaligned.
the "flexibility" in this type seem to be different:
if hole diameter is larger than shaft diameter, shaft contact is not a large surface area, contact is only in points. this means during rotation wear points would appear at contact points. perhaps tightening it in few iterations may get the wear correct for misalignment.
if hole diameter matches shaft diameter, then flex will be somewhere else, such as shaft. this will create asymmetrical load and wear the bushing.
there are other possible explanations and it would be interesting to know what really goes on but whatever it is, i doubt it would change my mind that is worth it.
the "flexibility" in this type seem to be different:
if hole diameter is larger than shaft diameter, shaft contact is not a large surface area, contact is only in points. this means during rotation wear points would appear at contact points. perhaps tightening it in few iterations may get the wear correct for misalignment.
if hole diameter matches shaft diameter, then flex will be somewhere else, such as shaft. this will create asymmetrical load and wear the bushing.
there are other possible explanations and it would be interesting to know what really goes on but whatever it is, i doubt it would change my mind that is worth it.
"Flexible" is an English word that appeared in other listings for products they identified as from competitors—so they put it in as a keyword to influence search results.
They almost certainly speak little or no English, or they are using Amazon SEO without caring whether they are wasting the time of people who actually want a flexible coupler.
They almost certainly speak little or no English, or they are using Amazon SEO without caring whether they are wasting the time of people who actually want a flexible coupler.
