Lock Pin Sizes

Tables of keying information for various brands of pin tumbler locks, including key cut depths and pin positions, pin sizes, progression, and MACS.

Definitions

Pin/Key Dimensions

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MACS

Maximum Adjacent Cut Specification: some pin systems place a restrict the difference between depths of adjacent pins to avoid creating sharp angles in the key. If the MACS is 4, a #1 cut cannot appear next to a #6 or higher.

Progression

The pin depths available for use as change keys, depending on the cut used on the top master key in a given pin position. In a 2-step progression system with 10 pin depths, a master cut of 4 will only allow changes with 0, 2, 6, or 8 in that same position. With 1-step progression, all other depths are available for change keys. 2-step progression is required in systems like A2 where the increments are so small that a #1 master pin could not stay in the pin chamber securely.

Standard Cylinders

Arrow

First cut .265" from shoulder, .155" centers, .014" increment, MACS 7, progression 2.

Pin sizes

#	Cut Depth	Bottom	Master
0	.312	.178
1	.298	.192
2	.284	.206	.028
3	.270	.220
4	.256	.234	.056
5	.242	.248
6	.228	.262	.084
7	.214	.276
8	.200	.290	.112
9	.186	.304

Corbin

First cut .250" (Z bow) or .197" (X bow) from shoulder, .156" centers, .014" increment, MACS 8, progression 1.

Pin Sizes

#	Cut Depth		Bottom		Master
	Z bow	X bow	Z bow	X bow
1	0.343	0.333	0.160	0.171
2	0.329	0.319	0.174	0.185	0.028
3	0.315	0.305	0.189	0.198	0.042
4	0.301	0.291	0.203	0.212	0.056
5	0.287	0.277	0.218	0.226	0.069
6	0.273	0.263	0.231	0.241	0.084
7	0.259	0.249	0.246	0.256	0.099
8	0.245	0.235	0.259	0.269	0.112
9	0.231	0.221	0.273	0.284	0.127
10	0.217	0.207	0.287	0.297

Dexter

First cut .216" from shoulder, .155" centers, .015" increment, MACS 7, progression 2.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.320	0.165
1	0.305	0.180
2	0.290	0.195	0.030
3	0.275	0.210
4	0.260	0.225	0.060
5	0.245	0.240
6	0.230	0.255	0.090
7	0.215	0.270
8	0.200	0.285	0.120
9	0.185	0.300

Emhart

First cut .250" from shoulder, .156" centers, .028" increment, MACS dependent on adjacent angles.

Pin Sizes

#	Cut depth	Bottom	Master	Driver
1				0.193
2	0.305	0.242	0.097	0.158
3	0.277	0.270	0.125
4	0.249	0.298	0.153
5	0.221	0.326
6	0.193	0.354

Emhart high security keying restrictions

• No # 1 cuts allowed -- cut will be too shallow to maintain angle
  • even though these cylinders are compatible with system 70, progression is limited to 2 - 6
  • mixing these high security cylinders with conventional system 70 cylinders must be carefully planned from inception -- please refer to the corbin/russwin cylinder manual for more information

• There is no # 1 master pin -- therefore change key cut must be at least 2 steps from master cut

• MACS is dependent on adjacent angles: when adjacent angles are the same, macs is 4; when adjacent angles are different, macs is 3

• When the bottom and master pins total 2, 3, or 4, the driver is a # 1

• When the bottom and master pins total 5 or 6, the driver is a # 2

Falcon

First cut .237" from shoulder, .156" centers, .018" increment, MACS 7, progression 2.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.315	0.168
1	0.297	0.186
2	0.279	0.204	0.036
3	0.261	0.222
4	0.243	0.240	0.072
5	0.225	0.258
6	0.207	0.276	0.108
7	0.189	0.294
8	0.171	0.312	0.144
9	0.153	0.330

Ilco

First cut .277" from shoulder, .156" centers, .018" increment, MACS 7, progression 2.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.320	0.180
1	0.302	0.198
2	0.284	0.216	0.036
3	0.266	0.234
4	0.248	0.252	0.072
5	0.230	0.270
6	0.212	0.288	0.108
7	0.194	0.306
8	0.176	0.324	0.144
9	0.158	0.342

Kwikset

First cut .247" from shoulder, .15" centers, .023" increment, MACS 4, progression 1.

Pin Sizes

#	Cut depth	Bottom	Master
1	0.329	0.172	0.023
2	0.306	0.195	0.046
3	0.283	0.218	0.069
4	0.260	0.241	0.092
5	0.237	0.264	0.115
6	0.214	0.287
7	0.191	0.310

Notes

• Kwikset does not make a #6 master wafer.

Lockwood

First cut .277" from shoulder, .156" centers, .015" increment, MACS 7, progression 1.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.320	0.150
1	0.305	0.165
2	0.290	0.180	0.030
3	0.275	0.195	0.045
4	0.260	0.210	0.060
5	0.245	0.225	0.075
6	0.230	0.240	0.090
7	0.215	0.355	0.105
8	0.200	0.370	0.120
9	0.185	0.385	0.135

Medeco

First cut .244" from shoulder, .170" centers, .030" increment, MACS 4, progression 1.

Pin Sizes

#	Cut depth	Bottom	Master	Driver
6	0.116	0.386		0.120
5	0.146	0.356	0.150	0.150
4	0.176	0.326	0.120	0.180
3	0.206	0.296	0.090	0.210
2	0.236	0.266	0.060	0.240
1	0.266	0.236	0.030	0.270

Notes

Medeco does not allow change keys with a #6 cut next to the shoulder

Medeco Biaxial

First cuts .213" (fore) and .275" (aft) from shoulder, .108" (aft-fore), .170" (fore-fore, aft-aft), .232" (fore-aft) centers, .025" increments, MACS 2 (aft-fore), 3 (fore-fore, aft-aft), 4 (fore-aft), progression 1.

Pin Sizes

#	Cut depth	Bottom	Master	Driver
1	0.264	0.239	0.025	0.270
2	0.239	0.264	0.050	0.240
3	0.214	0.289	0.075	0.210
4	0.189	0.314	0.100	0.180
5	0.164	0.339	0.125	0.150
6	0.139	0.364

Medeco Keymark

First cut .195" from shoulder, .15" centers, .0125" increment, MACS 9.

Pin Sizes

#	Cut depth	Bottom	Master	Driver
0	0.1385	0.110
1	0.1260	0.122
2	0.1135	0.135	0.025
3	0.1010	0.147	0.037
4	0.0885	0.160	0.050
5	0.0760	0.172	0.062
6	0.0635	0.185	0.075
7	0.0510	.197*	0.087
8	0.0385	.210*	0.100
9	0.0260	.222*	0.112

* Spool pins

Russwin

First cut .25" from shoulder, .156" centers, .015" increment, MACS 7.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.341	0.160
1	0.326	0.175
2	0.311	0.189	0.030
3	0.296	0.203	0.045
4	0.281	0.220	0.060
5	0.266	0.234	0.075
6	0.251	0.248	0.090
7	0.236	0.263	0.105
8	0.221	0.279	0.120
9	0.206	0.294	0.135

Sargent

First cut .216" from shoulder, .156" centers, .02" increment, MACS 7.

Pin Sizes

#	Cut depth	Bottom	Master
1	0.328	0.170
2	0.308	0.190	0.040
3	0.288	0.210	0.060
4	0.268	0.230	0.080
5	0.248	0.250	0.100
6	0.228	0.270	0.120
7	0.208	0.290	0.140
8	0.188	0.310	0.160
9	0.168	0.330	0.180
10	0.148	0.350

Schlage

First cut .231" from shoulder, .156" centers, .015" increment, MACS 7, progression 2.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.335	0.165
1	0.320	0.180
2	0.305	0.195	0.030
3	0.290	0.210
4	0.275	0.225	0.060
5	0.260	0.240
6	0.245	0.255	0.090
7	0.230	0.270
8	0.215	0.285	0.120
9	0.200	0.300

Segal

First cut .262" from shoulder, .156" centers, .02" increment, MACS 5.

Pin Sizes

#	Cut depth	Bottom	Master
0	0.315	0.166
1	0.295	0.186	0.020
2	0.275	0.206	0.040
3	0.255	0.226	0.060
4	0.235	0.246	0.080
5	0.215	0.266	0.100
6	0.195	0.286

System 70

Weiser

Weslock

Yale

First cut .206" from shoulder, .165" centers, .019" increments, MACS 7, progression 2.

#	Cut Depth	Bottom	Master
0	.320	.182
1	.301	.201
2	.282	.220	.038
3	.263	.239
4	.244	.258	.076
5	.225	.277
6	.206	.296	.114
7	.187	.315
8	.168	.334	.152
9	.149	.353

Interchangeable Cores

A2 (Best and other SFIC)

First cut .08" from notch, .15" centers, .0125" increment, no MACS, progression 2.

#	Cut Depth	Bottom	Master	Control	Driver
0	.318	.110
1	.305	.122
2	.293	.135	.025	.025
3	.280	.147	.037	.037
4	.268	.160	.050	.050	.050
5	.255	.172	.062	.062	.062
6	.243	.185	.075	.075	.075
7	.230	.197	.087	.087	.087
8	.218	.210	.100	.100	.100
9	.205	.222	.112	.112	.112
10				.125	.125
11				.137	.137
12				.150	.150
13				.162	.162
14				.175
15				.187
16				.200
17				.212
18				.225
19				.237

Notes

• If the master cut is even, make the corresponding control cut odd.
• If the master cut is odd, make the corresponding control cut even.
• Drivers: To calculate drivers, add 10 to the control key cut and subtract from 23. This calculation is constant throughout the system.

A3

A4

Corbin

Emhart

Medeco

Medeco Biaxial

Medeco Keymark

Russwin

Sargent

System 70

Sources

Pin Sizes

• http://replay.web.archive.org/20060314181603/http://www.dlaco.com/spacing/spacing.htm
• http://www.lsamichigan.org/images/Sargent%207300%20Small%20Format%20Interchangeable%20Core%20Manual.pdf

General Information

• http://lockpickernetwork.wikidot.com/understanding-key-bitting

-- StephenCavilia - 19 May 2011