Обший каталог Yamawa 2016 - 2017 - страница 684

POINT DRILLS

Product features

●High rigidity design of the drills enables high speed cutting.

• High helix design enables high accuracy of surface finishing due to excellent cutting performance.

Point angle:125°, Chamfering angle：90°（60°） By using two types of angles, centering process and chamfering process are obtained at the same time.

●Different from normal center drills, because of no drill portion, there is no breakage trouble of drill portion.

• Two processes, centering and chamfering, are obtained at the same time. Point drills are also used for other processes such as fluting.
• The figures of drill end are two stepped flat type. This type enables excellent chamfering, and high precision cutting becomes possible.

Examples of usage

Centering Chamfering Beveling Fluting

Cutting processes

Point drills Drilling Tapping

Centering process

and chamfering

process are obtained

at the same time.

Test of continuous centering

1120 holes oint rilloint rill 1120 holes c n e usec n e use oint rilloint rill

Work Cutting Dia. of Cutting furt erfurt er c n e usec n e use

Tool Feed Machine Lubricant 1115 holesfurt erfurt er

material speed chamfer hole depth 1200 1115 holes

1200 SCM440

25m/min 0.15 /rev SCＭ440

(Alloy steel) 1000 SCＭ440

1000 S50C Machining

• Water S50C

20 SUS304

SUS304 direction 600 SUS304

• 600

(Stainless 15m/min 0.1 /rev

steel) 400 400 166 holes 166 holes 200 200

SCＭ440 0 S50C SUS304

SCＭ440 S50C SUS304