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Miniature Motors for Automated Watch Winder

Automated Watch Winder
Automated Watch Winder

Challenge 

A self-winding watch is a mechanical watch whose mainspring is wound automatically as a result of natural motion of the wearer's arm. This provides energy to run the watch, and eliminates the need for winding the watch manually. It’s a sophisticated product that needs frequent care and attention, and its internal mechanism may get jammed if not kept in use over a period of time.

A watch winder is designed to reproduce the natural movements of the wearer’s wrist, thus keeping the watch wound. This ensures the durability of the watch as well as its precision. A high performance motor controlled by a microprocessor is responsible for regulating the winder rotations throughout the day. Portescap's DC Coreless motors are ideal for automated watch winders providing multiple options in diameter. All models operate with a high efficiency and thus promote long battery life. Gearheads are available to provide higher torque and finer resolution while operating with minimum noise.

Benefits 

  • High efficiency for longer battery life

  • Low noise due to lower input speed into the gearbox

  • Enhanced accuracy and speed

  • Commutation system chosen based on requirements

  • Multiple diameter options to suit space envelope

Customization Options 

  • Ball bearings for longer life

  • Encoders for position feedback

  • Shaft modifications

  • Multiple gear ratios available

  • Coil voltage options to match battery supply

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(in) Diameter{%BR%}(mm) No-Load Speed{%BR%}(rpm) No-Load Current{%BR%}(mA) Output Power{%BR%}(W) Stall Torque{%BR%}(oz-in) Stall Torque{%BR%}(mNm) Torque up to{%BR%}(oz-in) Torque up to{%BR%}(mNm) Torque Constant (oz-in/A) Torque Constant (mNm/A)
16DCT Athlonix - Graphite 0.63 16 9,648 51.7 4.0 2.22 15.70 0.72 5.06 1.23 8.7
16DCT Athlonix - Precious metal 0.63 16 7,970 9.4 4.2 1.81 12.77 0.76 5.36 1.52 10.7
16N28 0.63 16 10,180 6.3 1.4 0.48 3.40 0.38 2.70 2.07 14.6
16N78 Athlonix 0.63 16 9,475 60.0 4.7 1.63 11.50 0.85 6.00 0.21 1.5
22DCP Athlonix - Precious Metal 0.87 22 11,049 4.9 4.5 2.45 17.28 0.84 5.94 5.81 41.0
22DCT Athlonix - Graphite 0.86 22 8,490 67.1 8.4 9.20 64.80 1.60 11.50 0.90 6.7
22DCT Athlonix - Precious metal 0.86 22 8,131 15.7 9.4 11.30 79.60 1.90 13.30 2.00 14.1
22N78 Athlonix 0.87 22 6,350 1.0 10.0 4.53 32.00 1.83 12.90 10.20 72.0
24DCT Athlonix - Precious Metal 0.94 24 7,631 4.0 8.6 8.79 62.10 1.95 13.79 8.48 59.9

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(mm) Diameter{%BR%}(in) Max Efficiency{%BR%}(%) Nominal Torque{%BR%}(mNm) Nominal Torque{%BR%}(oz-in) Max. Recommended Input Speed{%BR%}(rpm)
B16 16.0 0.63 48 120.0 17.0 8,000
K24 24.0 0.94 75 170.0 24.0 5,000