The Dog stake is completed as you see on the pictures ,
I still need to fine tune the dogstake and start polishing the whole thing so i hope to test it within a month.
Are the sheave bolts shoulder bolts? (With a polished cylindrical section through the cheeks and sheave followed by a smaller threaded section for the nut. Sometimes called stripper bolts.)
Or are they plain bolts? (Partially threaded, but essentially all the same diameter.)
I recommend using shoulder bolts, which will allow you to tighten the nut fully, and still allow the sheave to rotate freely. The cylindrical portion of shoulder bolts is typically polished and of an accurate diameter, which would allow your sheave to turn more freely.
If you have to use plain, partially threaded bolts, let me suggest using elastic stopnuts (sometimes called Nylock™ - which is a tradename of Forest Fasteners) like the one pictured at the top of the vertical shaft. This will allow you to leave the sheave loose without risking having the device come apart at an inopportune time.
Upper bolt: 5/16"-18 partially threaded bolt w/ elastic stop nut.
Lower bolt: Shoulder bolt 5/16 x 5/8" shoulder, 1/4-20 thread w/ plain hex nut.
Here is a US source for Shoulder Bolts: http://www.mcmaster....-screws/=9bd6t7
Edited by --Pete, 17 October 2010 - 07:19 AM.