NIKKEN ZERO FIT HOLDER “0” Fit with Accurate, Quick and Simple Operation.
P. 131,132
When the machine has been used for 2 ～ 3 years, the run-out accuracy of the spindle will be declining with accuracy of 0.01mm ～ 0.04mm at 100mm from the gauge line, the Zero Fit Holder allows correction of this error back to the run-out of 0.001 ～ 0.002mm.
Multi-Cam Style The minute run-out after adjusting by a master cam can be adjusted by fine adjust cams at the same position. e.g. BT40-SZF16-90-C3 (3 Cams) The multi-cam style can not be made for all zero fit holders.
Multi-Cam Style
Fine Adjust Cam
CF-CZF P.131
FLANGE STYLE ZERO FIT TYPE MILLING CHUCK
Ideal for adjusting cutter run-out on an NC grinding machine or universal grinding machine 3-point cam as a standard feature makes it easy to adjust run-out on a grinding machine!
Master Cam
At Machine Spindle
With “0” Fitting the Tool Run-out Accuracy; The milling surface finish and quality can be improved.
After Zero Fitting : Run-out at cutter front edge = 1 micron
Before Zero Fitting : Run-out at cutter front edge = 20 microns
Materials : Pre-Hardened Steel NAK55 ( HRC39 ) End Mill : 10mm, 2 teeth Carbide Ball End Mill Cutting Speed : V =200m/min Spindle Rotation : S =6,366r/min Feed per tooth : f =0.15mm/min Feed : F =1,910mm/min Dry Cutting with Air blow
For better and stable finish tolerance for machining holes … The variation at finish tolerance can be minimized, thus the finish size tolerance can be reduced.
X after Zero Fitting Y after Zero Fitting
X before Zero Fitting Y before Zero Fitting
Bore Dia. ( X, Y ) after Reaming ( μ m )
25
Before Zero Fitting : Run-out at cutter front edge = 22 microns
Materials : Tempered Steel ( HRC25 ～ 30 ) Tool : φ 13mm CBN Reamer Cutting Speed : V=80m/min Spindle Rotation: S=2,000r/min Feed per tooth : f=0.1mm/min Feed : F=200mm/min External coolant supply : Water soluble
20
15
10
5
After Zero Fitting : Run-out at cutter front edge = 2 microns
0
1
3 5 7 9 1113151719212325272931333537394143454749
Number of Reaming
TOOL LIFE ( Relative Comparison )
The tool life can be extended. Fig.1 shows the relation between run-out accuracy and tool life, and when the run-out accuracy of 21 microns is reduced to 3 microns, the tool life can be improved by approximately 5 times. Zero Fit Holder has wide adjustment range compared with competitors equivalent, and its mechanism performs simple, quick and secured operation. The choice of the Slim Chuck style “ SZF ” & the Anniversary type Milling Chuck style “ CZF ” can be selected depending on your cutter.
3
21
6 9 12 15 18
24
RUN-OUT ( μ m )
Fig.1
21
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