Old 09-20-16 | 03:07 PM
  #16  
Lakerat
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Originally Posted by shelbyfv
Here are Compass Cycles instructions for their Rene Herse cranks. https://www.compasscycle.com/tech-info/crank-bb-spec/ They say lightly grease.

SKF bottom bracket installation info from that site:


"Please see the crank manufacturer’s instructions for grease application. Put the crank on the interface at the bottom bracket and tighten the crank screw as recommended by the crank manufacturer."


The Rene Herse install info:


" Lightly grease the bottom bracket spindle tapers. The lubrication allows the crank to seat evenly. • Apply grease to the threads of the crank bolts. Do not apply grease to the rear of the bolt heads. They must be dry to interlock with the crank and prevent loosening. • Place one crankarm on the spindle. Insert and tighten the crank bolt to 3540 Nm. Repeat with the second crankarm. • After about 50-100 km (30-60 miles), re-tighten the crank bolts to 35-40 Nm. Do not re-tighten the crank bolts thereafter, as this will pull the cranks too far onto the spindle. This can lead to premature failure."


Similar torque specs in the Campy link above: 32-38Nm, and the Rene Herse: 35-40 Nm.


A factor not considered is if the grease has solid lubricants in it such as Teflon or Moly. I would think you would not want greases with any of these for this applications.

Last edited by Lakerat; 09-20-16 at 03:34 PM.
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