Section 3 - 2
K
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Stops
Peaks keys have two stops, a
bow stop
and a
tip stop
. The bow stop gauges keys in all current products.
The tip stop gauges only in non-domed face small format interchangeable cores made prior to March,
1996. Either stop may be used when code cutting depending on the machine employed.
Most Peaks key sections are paracentric and not designed to be clipped on a key bitting punch.
Paracentric keyways are preferred for their enhanced pick resistance. They also produce many more key-
way variations than flat bladed keys.
Factory bittings are tip to bow
Factory bitting lists are written tip to bow. When using card-type key machines such as the Ilco Universal II
or HPC 1200 CM, it is suggested that keys be cut bow to tip to lessen the effects of the backlash of the
rack-and-pinion mechanism. Care must be taken in reversing bittings written as tip to bow.
Tolerances and milling cutters
Peaks tolerances are tighter than most other brands. Both depth and spacing must be held /-
0.002" for proper operation. Key machines must be kept in precise adjustment. The required cutter angle is
90 degrees for proper key insertion. A cut root flat of .046" is required. The 90MC or equivalent cutter is
recommended.
Position next to the Peak
In the position next to the Peak, cuts deeper than a #6 in the A2 system or a #3 in the A4 system require
the use of an asymmetrical cutter, such as the #1011.
The 90MC cutter can not be used as it removes the upper Peak when making these deep cuts next to the
Peak.
MACS
140 A2 MACS is 8.
140 A4 MACS is 4.
150 A2 MACS is 9.
150 A4 MACS is 5.
Depth and spacing data
Depths
.140 Spacing
A2
A4
from tip
from bow
0
.318"
.318"
1
.136"
1.030"
1
.305"
.297"
2
.276"
.890"
2
.293"
.276"
3
.416"
.750"
3
.280"
.255"
4
.556"
.610"
4
.268"
.234"
5
.696"
.470"
5
.255"
.213"
6
.836"
.330"
6
.243"
7
.230"
8
.218"
9
.205"
7
8
9
7
8
9
Key Bitting Specifications
.150 Spacing
from tip
from bow
0
.086"
1.080"
2
.236"
.930"
3
.386"
.780"
4
.536"
.630"
5
.686"
.480"
6
.836"
.330"
Summary of Contents for Peaks Preferred
Page 1: ...Technical Manual Preferred Classic ...
Page 3: ...Peaks Preferred Classic Notes ...
Page 4: ...Technical Manual Section 1 Introduction Preferred Classic ...
Page 12: ...Technical Manual Section 2 Product Information Preferred Classic ...
Page 19: ...Section 2 7 Product Information Peaks Preferred Classic Notes ...
Page 41: ...Section 2 30 Product Information Peaks Preferred Classic Notes ...
Page 42: ...Section 2 31 Product Information Peaks Preferred Classic Notes ...
Page 43: ...Section 2 32 Product Information Peaks Preferred Classic Notes ...
Page 44: ...Technical Manual Section 3 Key Cutting and Pinning Preferred Classic ...
Page 66: ...Section 3 22 Key Cutting Pinning Peaks Preferred Classic Notes ...
Page 67: ...Section 3 23 Key Cutting Pinning Peaks Preferred Classic Notes ...
Page 68: ...Preferred Classic Technical Manual Section 4 Key Control Record Keeping ...
Page 79: ...Section 4 11 Key Control Record Keeping Peaks Preferred Classic Notes ...
Page 80: ...Preferred Classic Technical Manual Section 5 Cylinder Installation Guide ...
Page 91: ...Section 5 11 Cylinder Installation Guide Peaks Preferred Classic Notes ...