Page 465 - Master Catalog 2017, Inch

Technical Information
Setup Recommendations

Setup Information and Recommendations

Tool “D” (above centerline)
Set ØB is defl ected to position “DF,” relieving the Tip of the Insert
load by defl ecting to a smaller bore, ØA. Tool “D” This enables the end user to hold closer tolerances,
cannot “dig in” because the cut (load) becomes produce a better fi nish, and avoid chatter.
lighter as it defl ects.
Tool “E” (on centerline or below)
Set ØB “digs in” and is defl ected toward position ØA
“EF” and bore ØC. The larger the load, the larger ØB
the defl ection. ØC
D
DF
E
EF

Built-in geometries of WIDIA-CIRCLE ™ precision
boring bars are based on the concept that the .010" (0,25mm) REF.
boring bar shank will always be positioned on
the machine spindle centerline. The cutting point
will be slightly high (against direction of rotation) Machine Spindle
except when facing centerline or cutting on Boring Bar
outside diameters.

Use WIDIA-CIRCLE precision setup level or: Slant Bed Machines
1. Use center height gage and position insert as
shown in illustration.
2. If center point is unavailable, mark the center of .010" (0,25mm) REF.
the bar stock with a centering punch or square. (insert parallel to turret travel)
Position the insert as shown in illustration.
3. Lay a straight edge on the insert to help position Center of Spindle
the insert parallel to the travel or centerline.
NOTE: In some cases, to help reduce
chatter or taper, the insert may
need to be rotated less than
.010" (0,25mm) but more than
.002" (0,05mm) above center.

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