@drhitler...are you referring to a "stoper" or "jack leg"?...shouldn't be feeding them into the roof or undercut from a ladder, scaffold or portable platforms are where they perform effectively as the force required is dependent upon the downward force at the base...if the bit is skiffing over the cut surface then it's not cutting, if it's got "hammer chatter" and bouncing around then there's too much applied forces, there should be a slight stalling sound with a grinding crunch which indicates that the bit is chewing through the bore hole material...fuck, I used to drill, load, blast and muck by myself at times, just remember two very important rules, never go into a drift or undercut until you scale, and, never drill into a bootleg...."now drill ye terriers drill, cause it's work all day for a penny in your pay"...
Zyklonbeekeeper 0 points 10 months ago
@drhitler...are you referring to a "stoper" or "jack leg"?...shouldn't be feeding them into the roof or undercut from a ladder, scaffold or portable platforms are where they perform effectively as the force required is dependent upon the downward force at the base...if the bit is skiffing over the cut surface then it's not cutting, if it's got "hammer chatter" and bouncing around then there's too much applied forces, there should be a slight stalling sound with a grinding crunch which indicates that the bit is chewing through the bore hole material...fuck, I used to drill, load, blast and muck by myself at times, just remember two very important rules, never go into a drift or undercut until you scale, and, never drill into a bootleg...."now drill ye terriers drill, cause it's work all day for a penny in your pay"...