northeastconfederate
Cast Iron
- Joined
- Jan 25, 2005
- Location
- New Egypt, NJ
I've been using the boring bar a bit lateley, and
have been astounded at the amount of deflection inherent in it. Or maybe it's the work deflecting. The work is a fairly large socket (finished inside diameter is 2.055"). I'm enlarging the 4 "teeth" on a spanner socket, so the teeth "hit" the cutting bit on their way by it. the bit is as close to the tool post as I can get it to minimize deflection (post is an import knock-off of an Aloris), so there's about 5" of the bar (which is substantial, guessing 5/8" dia) extending ot the other side of the tool post. This end of the bar jumps at LEAST 1/16" each time the teeth of the socket hit the cutteing bit. without changing the cross feed, just making the same cut again, it takes another 3 or so thou! Any way to calculate and compensate for this, or just go slowly and carefully with very light cuts?
have been astounded at the amount of deflection inherent in it. Or maybe it's the work deflecting. The work is a fairly large socket (finished inside diameter is 2.055"). I'm enlarging the 4 "teeth" on a spanner socket, so the teeth "hit" the cutting bit on their way by it. the bit is as close to the tool post as I can get it to minimize deflection (post is an import knock-off of an Aloris), so there's about 5" of the bar (which is substantial, guessing 5/8" dia) extending ot the other side of the tool post. This end of the bar jumps at LEAST 1/16" each time the teeth of the socket hit the cutteing bit. without changing the cross feed, just making the same cut again, it takes another 3 or so thou! Any way to calculate and compensate for this, or just go slowly and carefully with very light cuts?