When you loosen the knurled collar (left hand thread from memory) you turning the crank will lengthen or shorten the stroke. This also directly effects the surface speed as the longer the stroke the faster the ram will travel. Should you for instance have a short stroke of under 1” you’ll want to have the gearbox on its high strokes per minute but if the stroke length is at max (18”) you want to run the gearbox at it’s slowest speed
Was a head scratcher for a bit to figure out just how to get it apart. Didn’t want to cut the groove but was left with no option. Really the bevel gear that you turn to turn the one that moves the slider should be replaced or rebuilt, fair bit of damage but meshes well so might be on the annual maintenance list for now
@@docsofftopic8130 true bevel gears are actually very difficult to machine on a conventional mill as the cut needs to wide which is why there’s purpose built bevel gear generators. Off the shelf blanks are incredibly cheap but need to be bored and keyed to size
..i sure like watching you work on this machinery Doc. Gears, levers and pulleys always fascinate me...
Been a long time coming, bigger project than I anticipated tbh
When you loosen the knurled collar (left hand thread from memory) you turning the crank will lengthen or shorten the stroke. This also directly effects the surface speed as the longer the stroke the faster the ram will travel. Should you for instance have a short stroke of under 1” you’ll want to have the gearbox on its high strokes per minute but if the stroke length is at max (18”) you want to run the gearbox at it’s slowest speed
Right hand thread, but that bevel gear was packed with swarf and was well jammed.
I saw bloody great job getting it all cleared out
Was a head scratcher for a bit to figure out just how to get it apart. Didn’t want to cut the groove but was left with no option. Really the bevel gear that you turn to turn the one that moves the slider should be replaced or rebuilt, fair bit of damage but meshes well so might be on the annual maintenance list for now
@@docsofftopic8130 true bevel gears are actually very difficult to machine on a conventional mill as the cut needs to wide which is why there’s purpose built bevel gear generators. Off the shelf blanks are incredibly cheap but need to be bored and keyed to size