Общий каталог Sumitomo 2018 - 2019 - страница 570

Run-out Accuracy

Run-out of the lip height B and thinning point A are (mm) important. MDS 140 MK 0,25 50C vc = 50m/min 0,20 f = 0,3mm/rev 0,15 0,10 0,05 0

within 0,03mm. If the run-out is (mm) 0 0,05 (mm) 0 10 (kg)

large, the drilled hole will also be large causing an increase in the 0,005 horizontal cutting force, which may result in drill breakage if the 0,09

machine or work clamping is not

rigid. Drill: MDS120MK Work material: C50 (230HB) Cutting data: vc=50 m/min, f=0,3 mm/rev, doc =38mm Water soluble

Run-out: within 0,03mm

Peripheral Run-out Chuck

Accuracy When use on a lathe, run-out at point A must be within Run-out: within 0,03mm

when Workpiece Rotates 0,03mm, this value must be similar when taken at position B.

Influence of Workpiece

Surface Workpiece with slanted or uneven surface (Entrance) (Exit)

If the surface of the hole entrance or exit is slanted or uneven, decrease the feedrate to 0,1~0,15mm/rev at these points.

How to Use Long Drill

Hole bend

When using a long drill (e.g. XHGS type and

Problem XHT type), DAK type or SMDH-D type drills at

high rotational speeds, the run-out of the drill

tip may cause a position shift at the entry point

making the drill hole bent and resulting in drill Position shift breakage. Remedies Method 1. No rotation

Step 2~3 mm Step

Drilling at recommended (n = 100~300 rpm) (f =0,15~0,2 mm/rev) condition