Gear Rack Chart

Model |
CM-0 MC-0 RC-0 |
CM-1 MC-1 RC-1 |
CM-2 MC-2 RC-2 |
CM-3 MC-3 RC-3 |
CM-4 MC-4 RC-4 |
CM-5 MC-5 RC-5 |
CM-6 MC-6 RC-6 |
CM-7 MC-7 RC-7 |
CM-8 MC-8 RC-8 |
CM-9 MC-9 RC-9 |
CM-10 MC-10 RC-10 |
CM-11 MC-11 RC-11 |
CM-12 MC-12 RC-12 |
Model |

Gear Rack | See Below | Gear Rack | ||||||||||||

E-12 | 40c | 4s | 10s | 20s | 40s | 2m | 3m20s | 10m | 20m | 40m | 2h | 3h20m | 8h | E-12 |

E-14 | 46.7c | 4.67s | 11.67s | 23.33s | 46.67s | 2m20s | 3m53s | 11m40s | 23m20s | 46m40s | 2h20m | 3h53m | 9h20m | E-14 |

D-12 | 48c | 4.8s | 12s | 24s | 48s | 2m24s | 4m | 12m | 24m | 48m | 2h24m | 4h | 9h36m | D-12 |

E-15 | 50c | 5s | 12.5s | 25s | 50s | 2m30s | 4m10s | 12m30s | 25m | 50m | 2h30m | 4h10m | 10h | E-15 |

E-16 | 53.3c | 5.33s | 13.33s | 26.67s | 53.3s | 2m40s | 4m27s | 13m20s | 26m40s | 53m20s | 2h40m | 4h27m | 10h40m | E-16 |

D-14 | 56c | 5.6s | 14s | 28s | 56s | 2m48s | 4m40s | 14m | 28m | 56m | 2h48m | 4h40m | 11h12m | D-14 |

C-12 | 1s | 6s | 15s | 30s | 60s | 3m | 5m | 15m | 30m | 60m | 3h | 5h | 12h | C-12 |

D-16 | 64c | 6.4s | 16s | 32s | 64s | 3m12s | 5m20s | 16m | 32m | 64m | 3h12m | 5h20m | 12h48m | D-16 |

E-20 | 66.7c | 6.67s | 16.67s | 33.33s | 66.67s | 3m20s | 5m33s | 16m40s | 33m20s | 66m40s | 3h20m | 5h33m | 13h20m | E-20 |

C-14 | 70c | 7s | 17.5s | 35s | 70s | 3m30s | 5m50s | 17m30s | 35m | 70m | 3h30m | 5h50m | 14h | C-14 |

D-18 | 72c | 7.2s | 18s | 36s | 72s | 3m36s | 6m | 18m | 36m | 72m | 3h36m | 6h | 14h24m | D-18 |

E-22 | 73.3c | 7.33s | 18.33s | 36.67s | 73.33s | 3m40s | 6m7s | 18m20s | 36m40s | 73m20s | 3h40m | 6h7m | 14h40m | E-22 |

C-15 | 75c | 7.5s | 18.75s | 37.5s | 75s | 3m45s | 6m15s | 18m45s | 37m30s | 75m | 3h45m | 6h15m | 15h | C-15 |

B-12 | 80c | 8s | 20s | 40s | 80s | 4m | 6m40s | 20m | 40m | 80m | 4h | 6h40m | 16h | B-12 |

E-26 | 86.7c | 8.67s | 21.67s | 43.33s | 86.67s | 4m20s | 7m13s | 21m40s | 43m20s | 86m40s | 4h20m | 7h13m | 17h20m | E-26 |

D-22 | 88c | 8.8s | 22s | 44s | 88s | 4m24s | 7m20s | 22m | 44m | 88m | 4h24m | 7h20m | 17h36m | D-22 |

C-18 | 90c | 9s | 22.5s | 45s | 90s | 4m30s | 7m30s | 22m30s | 45m | 90m | 4h30m | 7h30m | 18h | C-18 |

B-14 | 93.3c | 9.33s | 23.33s | 46.67s | 93.33s | 4m40s | 7m47s | 23m20s | 46m40s | 93m20s | 4h40m | 7h47m | 18h40m | B-14 |

D-24 | 96c | 9.6s | 24s | 48s | 96s | 4m48s | 8m | 24m | 48m | 96m | 4h48m | 8h | 19h12m | D-24 |

B-15 | 100c | 10s | 25s | 50s | 100s | 5m | 8m20s | 25m | 50m | 100m | 5h | 8h20m | 20h | B-15 |

D-26 | 104c | 10.4s | 26s | 52s | 104s | 5m12s | 8m40s | 26m | 52m | 104m | 5h12m | 8h40m | 20h48m | D-26 |

B-16 | 106.7c | 10.67s | 26.67s | 53.33s | 106.7s | 5m20s | 8m54s | 26m40s | 53m20s | 106m40s | 5h20m | 8h54m | 21h20m | B-16 |

C-22 | 110c | 11s | 27.5s | 55s | 110s | 5m30s | 9m10s | 27m30s | 55m | 110m | 5h30m | 9h10m | 22h | C-22 |

D-28 | 112c | 11.2s | 28s | 56s | 112s | 5m36s | 9m20s | 28m | 56m | 112m | 5h36m | 9h20m | 22h24m | D-28 |

E-34 | 113.3c | 11.33s | 28.33s | 56.67s | 113.3s | 5m40s | 9m27s | 28m20s | 56m40s | 113m20s | 5h40m | 9h27m | 22h40m | E-34 |

A-12 | 2s | 12s | 30s | 60s | 2m | 6m | 10m | 30m | 60m | 2h | 6h | 10h | 24h | A-12 |

D-32 | 2s8c | 12.78s | 32s | 64s | 128s | 6m24s | 10m40s | 32m | 64m | 2h8m | 6h24m | 10h40m | 25h36m | D-32 |

C-26 | 2s10c | 13s | 32.5s | 65s | 130s | 6m30s | 10m50s | 32m30s | 65m | 2h10m | 6h30m | 10h50m | 26h | C-26 |

B-20 | 2s12c | 13.2s | 33.33s | 66.67s | 133.3s | 6m40s | 11m7s | 33m20s | 66m40s | 2h13m | 6h40m | 11h7m | 26h40m | B-20 |

D-34 | 2s16c | 13.56s | 34s | 68s | 136s | 6m48s | 11m20s | 34m | 68m | 2h16m | 6h48m | 11h20m | 27h12m | D-34 |

A-14 | 2s20c | 14s | 35s | 70s | 140s | 7m | 11m40s | 35m | 70m | 2h20m | 7h | 11h40m | 28h | A-14 |

D-36 | 2s24c | 14.4s | 36s | 72s | 144s | 7m12s | 12m | 36m | 72m | 2h24m | 7h12m | 12h | 28h48m | D-36 |

B-22 | 2s27c | 14.7s | 36.67s | 73.33s | 146.7s | 7m20s | 12m13s | 36m40s | 73m20s | 2h27m | 7h20m | 12h13m | 29h20m | B-22 |

A-15 | 2s30c | 15s | 37.5s | 75s | 150s | 7m30s | 12m30s | 37m30s | 75m | 2h30m | 7h30m | 12h30m | 30h | A-15 |

A-16 | 2s40c | 16s | 40s | 80s | 160s | 8m | 13m20s | 40m | 80m | 2h40m | 8h | 13h20m | 32h | A-16 |

C-34 | 2s50c | 17s | 42.5s | 85s | 170s | 8m30s | 14m10s | 42m30s | 85m | 2h50m | 8h30m | 14h10m | 34h | C-34 |

B-26 | 2s52c | 17.2s | 43.33s | 86.67s | 173.3s | 8m40s | 14m27s | 43m20s | 86m40s | 2h53m | 8h40m | 14h27m | 34h40m | B-26 |

A-18 | 3s | 18s | 45s | 90s | 3m | 9m | 15m | 45m | 90m | 3h | 9h | 15h | 36h | A-18 |

B-28 | 3s7c | 18.7s | 46.67s | 93.33s | 186.7s | 9m20s | 15m33s | 46m40s | 93m20s | 3h7m | 9h20m | 15h33m | 37h20m | B-28 |

A-20 | 3s20c | 20s | 50s | 100s | 200s | 10m | 16m40s | 50m | 100m | 3h20m | 10h | 16h40m | 40h | A-20 |

B-32 | 3s33c | 21.3s | 53.33s | 106.7s | 213.4s | 10m40s | 17m47s | 53m20s | 106m40s | 3h33m | 10h40m | 17h47m | 42h40m | B-32 |

A-22 | 3s40c | 22s | 55s | 110s | 220s | 11m | 18m20s | 55m | 110m | 3h40m | 11h | 18h20m | 44h | A-22 |

B-34 | 3s47c | 22.7s | 56.67s | 113.3s | 226.7s | 11m20s | 18m53s | 56m40s | 113m20s | 3h47m | 11h20m | 18h53m | 45h20m | B-34 |

A-24 | 4s | 24s | 60s | 2m | 4m | 12m | 20m | 60m | 2h | 4h | 12h | 20h | 48h | A-24 |

A-26 | 4s20c | 26s | 65s | 130s | 260s | 13m | 21m40s | 65m | 2h10m | 4h20m | 13h | 21h40m | 52h | A-26 |

A-28 | 4s40c | 28s | 70s | 140s | 280s | 14m | 23m20s | 70m | 2h20m | 4h40m | 14h | 23h20m | 56h | A-28 |

A-30 | 5s | 30s | 75s | 150s | 5m | 15m | 25m | 75m | 2h30m | 5h | 15h | 25h | 60h | A-30 |

A-32 | 5s20c | 32s | 80s | 160s | 320s | 16m | 26m40s | 80m | 2h40m | 5h20m | 16h | 26h40m | 64h | A-32 |

A-34 | 5s40c | 34s | 85s | 170s | 340s | 17m | 28m20s | 85m | 2h50m | 5h40m | 17h | 28h20m | 68h | A-34 |

A-36 | 6s | 36s | 90s | 3m | 6m | 18m | 30m | 90m | 3h | 6h | 18h | 30h | 72h | A-36 |

- c - Cycles
- s - Seconds
- m - Minutes
- h - Hours

- Select basic type of timer required for your application, i.e., MC (recycling), RC (single), etc.
- Locate overall time cycle required for one revolution of camshaft on the gear rack chart.
- Note the model designated from the top of that column, i.e., MC-2, RC-4, etc.
- Cross column from time cycle for gear rack.
- Specify required number of load switches.
- Specify voltage and frequency.

- Basic Type: MC
- Time Range: 2
- Gear Rack (specific time cycle): A-12
- Number of load switches: 5SW
- Voltage and Frequency: 120/60

Because of the increased torque encountered with multi-switch cam timers in the rapid time cycles, the Series MC-0 and RC-0 timers require High Torque Motors (HTM). This is also true of some MC-1 and RC-1 timers. *(See vertical shaded area of chart.)*

To determine the need of an HTM in the Series MC-1 and RC-1, multiply required time cycle in seconds by 2/3. The answer will be the maximum number of switches that can be operated with a standard timing motor; e.g. time cycle 15 seconds, 2/3 x 15s=10. 10 switches can be operated at 15 seconds with a standard timing motor, more than 10 load switches will require the use of an HTM.

If there is any doubt relative to the use of an HTM, consult factory. Note that the C-12 Gear Rack *(horizontal shaded area of the chart)* provides a cam rotation speed directly proportional to the motor output; e.g. MC-6=1 revolution in 5 minutes. Also, the letter C which signifies CYCLES = 1/60th of a second.