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Use the questions below to determine your
tooling requirements. You can also fill out and fax this
information to us if you need assistance with your tooling selection.
Fax it to: (877) 776-9994.
Name_____________________________________________
Company__________________________________________
Address___________________________________________
City______________________St_____Zip_______________
e-mail:_________________Ph:____________Fax__________
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What is the
diameter tolerance? _______________________________
(determines rough or finish head)
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What is the
finish diameter of the bore? _________________________
(determines connection diameter)
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Is the bore
a thru bore, or step bore design? _____________________
(75° lead = thru bore / 90° lead = step bore)
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What is the
material to be machined? __________________________
(determines insert code selection)
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What is the
machine spindle? ________________________________
(determines toolholder selection)
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What is the
finish depth of the bore? ___________________________
(determines length of shank & extensions)
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What end of the spindle projection do you require?______________
(determines length of shank & extensions)
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Does the
spindle have thru spindle coolant? _____________________
Flood coolant? ____________
DIN "B"?_____________________
(if yes, calculate length of shank
requirements)
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What is the
starting diameter of the bore? _______________________
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What is the
depth of cut requirement? __________________________
Finish diameter - starting diameter / 2 =
depth of cut_______________ (determines
insert tool nose radius selection)
Misc:
Select coolant through spindle based on connection
diameter and bore depth requirements (question #7 above)
Need a quote? quote request form
Need help? Call (800) 579-3921 for fast, friendly assistance.
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Boring Tips
Speeds & Feeds
For best finish, generally feed at 25% of nose radius. Optimal
speeds & feeds depend upon material, machine, tool overhang and setup
conditions.
Insert Corner Radius
For heavy roughing use the largest available corner radius unless
otherwise specified. For finish boring use the smallest corner
radius to minimize lateral deflection, especially on long overhangs.
Boring Depth
Depths of 5x diameter for rough boring and 3x diameter for finish boring
using carbide tooling are achievable. At depths greater than that
harmonic chatter and deflection may become a problem, causing you to
adjust feeds & speeds. Changes in the amount of side block
extension may require adjustment of feeds & speeds.
Depth of Cut
Depth of cut is a function of material and tool nose radius.
Generally the ideal minimum diameter depth of cut is equal to the insert
nose radius. The maximum stock removal rate for rough boring may
have to be decreased on very tough materials or extended overhangs and
extended slide blocks.
Rough Boring 75° vs 90°
For maximum removal rates when a square shoulder is not required, use a
75° boring head. The 75° head self-centers in the hole for a more
stable cut. However, if the hole is off-center or off-angle then
use the 90° head because it will have less tendency to follow the
existing hole.
Boring Bar Overhang
The maximum boring depth for steel boring bars is 5x bar diameter.
For solid carbide bars 7x bar diameter. To maximize boring
efficiency we recommend the shortest possible overhang be used.
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