305 Koehring Build Start

[9W Monighan]

Originally Posted by bartles

9W, no these are not pipe threads, just a poor job of spindle speed vs thread speed! Incidentally, nice job on your barrel machining....I think I'll copy your grooves with a more rounded lathe tool and increase the pitch to accommodate larger rope...and slow down my spindle speed for sure!! You will see smaller to larger diameter drum sizing in many shovel applications...the small diameter is utilized at the initial beginning of the dig cycle to help the machines break out force then increasing line speed to increase the machines cycle speed(according to a Koehring serviceman who helped us with a warranty repair/replacement service call)
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Thank you explaining the tapered drum better. I left that part out about smaller diameter giving more power for breakout force.
I can't remember what TPI I used to cut the laggins on my machine.
Do you have a prts book for your 305? I think I saw one on ebay yesterday