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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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<blockquote data-quote="Canadian Bushman" data-source="post: 1141654" data-attributes="member: 41122"><p>Thats kinda what brought me to ask this question. I have an old b&s indicator i got from my dad thats really sensitive and i dialed in a bore on a barrel i was getting ready to cut, then got off for the night. Mind you after ive been running the machine for a few hours. </p><p></p><p>When i left i had a 4-6 inch section running dead nuts and about a 10" section inside .0005" and could just about bury the rod and never cross .001". </p><p></p><p>Came back the next day to a cold machine and the bore was everywhere. .0005" at the closest and .0015 almost .002 across the length of the rod.</p><p></p><p>The best lathe spindle i ever had was a hardinge hlv just after the spindle was rebuilt and ground. It ran a legitamate .0002 all day. First and last machine i ran that could do that. Now i just let em run for a while in the morning.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1141654, member: 41122"] Thats kinda what brought me to ask this question. I have an old b&s indicator i got from my dad thats really sensitive and i dialed in a bore on a barrel i was getting ready to cut, then got off for the night. Mind you after ive been running the machine for a few hours. When i left i had a 4-6 inch section running dead nuts and about a 10" section inside .0005" and could just about bury the rod and never cross .001". Came back the next day to a cold machine and the bore was everywhere. .0005" at the closest and .0015 almost .002 across the length of the rod. The best lathe spindle i ever had was a hardinge hlv just after the spindle was rebuilt and ground. It ran a legitamate .0002 all day. First and last machine i ran that could do that. Now i just let em run for a while in the morning. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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