Hole Making HP Drilling Tool Series
Drilling Holder Denomination System
HP 1
2D 2
255 3
S32 4
S07 5
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1- Drilling Holder Series
2- Aspectratio
3- Nominal Diameter of Drilling Holder
HP Series HY Series
Lu/Dc=2 Lu/Dc=3 Lu/Dc=4 Lu/Dc=5
255-- Drill Dia. Dc 25.5mm
4- Shank Dia.
4- Insert
S32--- Fully flattened side
S07-- Suitable for SPMT07 insert SP03-- Suitable for N0.03 insert
Side lock, Shank Dia. 32mm
Drilling Holder Tolerance and Hole Tolerance---HPseries
∅ 13 - ∅ 21.5mm
∅ 22 - ∅ 50mm
HP Series
Holder tolerance
0,-0.1
0,-0.1
2*DC
Hole tolerance
-0.1 ～ +0.15
-0.1 ～ +0.15
Holder tolerance
0,-0.1
0,-0.1
3*DC
Hole tolerance
-0.1 ～ +0.18
-0.12 ～ +0.2
Holder tolerance
0,-0.1
0,-0.1
4*DC
Hole tolerance
-0.15 ～ +0.20
-0.15 ～ +0.25
Drilling Holder Tolerance and Hole Tolerance---HYseries
Influence factors of drilling diameter
∅ 13 - ∅ 21.5mm
∅ 22 - ∅ 50mm
HY Series
Holder tolerance
0,+0.1
0,+0.1
Chip evacuation
2*DC
Hole tolerance
-0.1 ～ +0.15
-0.1 ～ +0.15
Drilling depth
Suitable chip breaker
Holder tolerance
0,+0.1
0,+0.1
3*DC
Hole tolerance
-0.1 ～ +0.18
-0.12 ～ +0.2
Cutting data
Wear of the cutting edge
Holder tolerance
0,+0.1
0,+0.1
4*DC
Hole tolerance
-0.15 ～ +0.20
-0.15 ～ +0.25
Drilling holder (Rigidity, chip space,cutting force)
workpiece (Material, hardness, clamping)
HY series drilling holder is easier to obtain positive tolerance hole diameters, but machining strategies need to be adjusted by the influence factors of drilling diameter.
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