Re gelmounts...
o Most are based on a polyurethane foam with high plasticisers
---- Sorbothane is an example of a such branded material
o They are viscoelastic materials
---- basically offering better absorption of vibration than rubber
Rubber will do ok, but the proper mounts will do a little bit better.
Frankly for quiet 7200rpm drives rubber will be ok, but when you
move into 10,000rpm & 15,300rpm drives the gel type will do better.
Do *not* overtighten, compression should usually be 5-12% and most
often at the lower end of that range. Sorbothane & gel mounts do work,
but the application has to be appropriate - as well as material choice too.
Another supplier of such mounts in the USA is McMaster-Com who
have a website and will do a wide variety of mounts to E-A-R Confor
foam (good for shock protection of drives to you bottom in a car/glider
The Gel mounts work slightly better by virtue of their integral sway space,
they are a non-space-filling design, so offer a small degree of shock resistance.
Vibration dampening is also included as a function of their material properties.
Common on high-end industrial to mil-spec laptops, from Panasonic
Toughbooks thro to the true 3yr-old-proof military grade laptops
))
Watch price tho, and ideally you want a large-washer over the screws.
2.5" drives tend to use M3, 3.5" tend to use the USA UNF sizing. A dawn
raid is planned sometime to change America over to M3, but they have made
a statement that M16 will be the chosen option should any attempt be tried
E-A-R or Gelmec in the UK show the type of screws - basically a large dia
integral washer to overlap the serrated nodules in the actual mounts, which can
readily be achieved with a washer probably for about 1/10th the price.
To shockmount a drive in a car, or your spine, use E-A-R Confor foam CF45,
which is blue and not the cheapy clone memory foams which aren't as good. It
was developed for helo seats, F16 fighter/ejector seats as the only foam which
didn't break your back on ejection by delaying & thus increasing the G impulse.