A spot drill makes a shallow, accurately-located start for a twist drill, and is also used for chamfering hole edges. CAM Assist needs its diameter and point geometry to position spots and size chamfers.
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Every tool also shows Name, Description, Tool type, Allowed uses and Allowed stock
materials above the geometry sections — see
the overview.
Main cutting geometry
Diameter DC
The body diameter. Sets the largest spot or chamfer the tool can produce and drives feeds and speeds.
Tip mode
How the point geometry is defined: by Point length or by Point angle. The matching field appears below.
Point length PL Point length
The axial length of the point.
Point angle SIG Point angle
The included angle of the point. For spotting/chamfering this sets the chamfer angle it cuts and helps centre the following drill (commonly 90° or 120°).
Face effective cutting edge count ZEFF
Number of cutting lips at the point. Scales the feed rate.
Non-cutting geometry
Overall length OAL
Total length from the holder face to the tip.
Connection diameter machine side DCONMS
The shank/connection diameter where the tool meets the holder.
Usable length LU
The length below the holder that can be brought into the cut.
Protruding length LPR
The tool's default protruding length (stickout); assemblies can override it.
Tool materials
Tool material BMC
The tool substrate (e.g. carbide, HSS).
Coating property CTP
Whether the tool is coated.
Coating COATN
The coating name/designation, if any.
Grade identification GRDID
The manufacturer's grade.
Supplementary cutting geometry
Coolant supply CSP
Whether the tool has through-tool coolant.
Connection code type machine side CCTMS
Standardised connection/interface code on the machine side.
Optional details
Manufacturer BRAND
Tool maker.
Manufacturer part number DES
Catalogue/part number.
Face edge count NOF
Number of effective cutting edges.
Shank length LS
Length of the shank.
Flute length LCF
Length of the fluted (chip) section.
Functional length LF
Functional length of the tool.
Tool assembly length LTA
Overall length of the assembled tool.
Centre drill style CTRSYC
The centre/spot drill style designation, where applicable.
