Kaba 5402 Series Technical Manual

Contents

Kaba 5402 Series Technical Manual Manual pdf 59 page image

Section 3 - 20Key Cutting & PinningCalculating Small Format Interchangeable Cores A4 Pinning Stacksplug totaladd top pin tomake a stacktotal of 14buildup pin equalscontrol cut + 6minus plug totalmaster pin equalsthe deep operatingcut minus theshallow cutbottom pinequals the shallowoperating cutA4 system has six depths numbered 0 to 5, shallow to deep, respectively. This is a single step progressionsystem. Because there is no parity in the A4 system, key interchange between systems in the same keywaycannot be prevented.The operating and control shear lines are distinct. All the operating keys work at the operating (plug) shearline. Only the control key works at the control shear line.Pin to the operating keys first. The shallow cut determines the bottom pin. A master pin makes up the differ-ence between shallow and deep operating cuts. The numerical value of the bottom pin and master pintogether is called the "plug total." For example, a #1 bottom pin plus a #4 master pin results in a plug total of5.Buildup pins are added to the plug total to make the control key operate at the control shear line. Top pinsare added to achieve a uniform pin stack height of 14 in all chambers.The control dimension, or thickness of the control lug, is a multiple of the increment. The increment is 0.021"while the control dimension is 0.21". Because the control lug is 6 increment units thick, the control shear lineis 6 units higher than the operating shear line.Calculating the pin stack3. Add a top pin to bring the total pin stack to 14.2. Add 6 to control bitting. Subtract plug total.The remainder is the buildup pin.1. Pin operating keys to the plug shear line.The plug total equals the deep operating bitting.