Gear review BMS Long micro rack· Page 3

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Tamarmole
50.2% (Neutral)
Newbie Topic Starter

11 years ago

#41

Used the BMS last night on a 60 - 70 foot descent in a stope on a very mucky 10mm rope.

With the rope bag hanging below me (i.e no rope weight below the descender) I found it necessary to use the hyperbar (in effect five bars).

Having climbed back up the stope I started to de rig only to find that the rope bag had jammed at the foot of the pitch. I dropped the pitch to free it. I found that with sixty odd feet of rope below me I only needed four bars.

On both occasions heat dissipation was excellent, the bars still being fairly cool at the bottom of the pitch.

The descent was smooth (compared with my companion who was using a stop and found the mucky rope an issue). It is worth noting that the stainless bars were faster than aluminium would have been.

Although I am still very much in the learning stage with the BMS I am rather chuffed with it.

exspelio
50.2% (Neutral)
Newbie

11 years ago

#42

Good review Tamar, makes me wonder whether to tool up and drill some stainless for my CS. J. Rack, shouldn't be too hard to add a hyperbar.

Although, somewhere I have 16ft of ally alloy (Dural?), bought for another purpose but never used :confused: .

Always remember, nature is in charge, get it wrong and it is you who suffers!.

Tamarmole
50.2% (Neutral)
Newbie Topic Starter

11 years ago

#43

"exspelio" wrote:
Good review Tamar, makes me wonder whether to tool up and drill some stainless for my CS. J. Rack, shouldn't be too hard to add a hyperbar.

Although, somewhere I have 16ft of ally alloy (Dural?), bought for another purpose but never used :confused: .

I am fairly convinced that stainless tube is the way forward for rack bars. It is more wear resistant that ally and larger surface area of tube over bar seems to be a winner as far as heat dissipation is concerned.

Depending on how knackered your existing bars are it might be worth just replacing the first and second bars as these seem to be the ones which take most hammering.

If you do get round to doing it post a review and a few photos.

exspelio
50.2% (Neutral)
Newbie

11 years ago

#44

"Tamarmole" wrote:

"exspelio" wrote:
Good review Tamar, makes me wonder whether to tool up and drill some stainless for my CS. J. Rack, shouldn't be too hard to add a hyperbar.

Although, somewhere I have 16ft of ally alloy (Dural?), bought for another purpose but never used :confused: .

I am fairly convinced that stainless tube is the way forward for rack bars. It is more wear resistant that ally and larger surface area of tube over bar seems to be a winner as far as heat dissipation is concerned.

Depending on how knackered your existing bars are it might be worth just replacing the first and second bars as these seem to be the ones which take most hammering.

If you do get round to doing it post a review and a few photos.

Do you have access to a set of calipers to give us some idea of dimensions for the bars? (external diameter, internal diameter, wall thickness??)

It might be worth thinking about mixing the bars, heavy wear on stainless, braking on ally?? --- Ideas please.

Always remember, nature is in charge, get it wrong and it is you who suffers!.

Tamarmole
50.2% (Neutral)
Newbie Topic Starter

11 years ago

#45

"exspelio" wrote:

"Tamarmole" wrote:

"exspelio" wrote:
Good review Tamar, makes me wonder whether to tool up and drill some stainless for my CS. J. Rack, shouldn't be too hard to add a hyperbar.

Although, somewhere I have 16ft of ally alloy (Dural?), bought for another purpose but never used :confused: .

I am fairly convinced that stainless tube is the way forward for rack bars. It is more wear resistant that ally and larger surface area of tube over bar seems to be a winner as far as heat dissipation is concerned.

Depending on how knackered your existing bars are it might be worth just replacing the first and second bars as these seem to be the ones which take most hammering.

If you do get round to doing it post a review and a few photos.

Do you have access to a set of calipers to give us some idea of dimensions for the bars? (external diameter, internal diameter, wall thickness??)

It might be worth thinking about mixing the bars, heavy wear on stainless, braking on ally?? --- Ideas please.

This is the stuff you want

http://www.ebay.co.uk/itm/1-2-NB-SCH-40-316-STAINLESS-STEEL-TUBE-X-500MM-/220897304270?pt=UK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET&hash=item336e815ece