Kaba 5402 Series Technical Manual

Contents

Kaba 5402 Series Technical Manual Manual pdf 56 page image

Section 3 - 17Key Cutting & PinningCalculating Small Format Interchangeable Core – A2 System Pin StacksA2 system has ten depths numbered 0 to 9, shallow to deep, respectively. Two step progression must beused to prevent key interchange. In A2 system, parity must be maintained in each position, i.e., only the oddor even cuts may be used in a given pin chamber.When a key system is written, the choice of a TMK automatically determines the parity pattern. Section 4 ofthis Manual has forms with all sixty-four parity patterns to use in maintaining a TMK register. This can alsobe done with a computer and data base program.The operating and control shear lines are distinct in all positions. All the operating keys work at the plug(operating) shear line. 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 thedifference between shallow and deep operating cuts. The numerical value of the bottom pin and masterpin together is called the "plug total." For example, a #3 bottom pin plus a #4 master pin results in a plugtotal of 7.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 23 in all chambers.Calculating the pin stack3. Add a top pin to bring the total pin stack to 23.2. Add 10 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.add top pin tomake stack total 23buildup pin equalscontrol cut + 10minus plug totalmaster pin equalsthe larger of themaster key or oper-ating key cut minusthe bottom pinbottom pin equalsthe smaller of themaster key or oper-ating key cutsplug total