MIYOTA 82S0, 82S3, 82S5, 82S7 Watch Movements
Technical specifications and winding information for MIYOTA's 82S series watch movements.
Product Overview
MIYOTA presents the 82S0, 82S3, 82S5, and 82S7 series of mechanical watch movements, known for their reliability and performance.
Key Specifications
| Feature | Specification |
|---|---|
| Size | 11 1/2" |
| Height | 5.67 mm |
| Accuracy (per Day) | -20 ~ +40 seconds |
| Posture Difference Accuracy | (under) 50 seconds |
| Running Time | (approximately) 42 hours |
| Vibration Frequency (per Hour) | 21600 vibrations |
| Clearance | Clearance changes subject to the glass, case structure, and the length of the hand.
|
| Jewels | 21 pcs |
| Lift Angle | 49 degrees |
| Original Package | 100 pcs |
Components and Dimensions
The movements are designed for compatibility and ease of assembly. Key components and dimensions include:
- Exchangeable parts: metal ring, casing clamps, screws.
- Attached Stem: 065-212
- Screw for dial fix: 929-610
- Plastic holder: 500-710
- Diameter: Φ26.00 mm
Model Variants and Features
The 82S series is available in a Gilt Version. Specific models feature:
- 8250: Includes 24 Hour and Small Second indicators.
- 8253: Includes 24 Hour and Small Second indicators.
- 8255: Includes 24 Hour and Small Second indicators.
- 8257: Includes 24 Hour and Small Second indicators.
These movements feature fine finishing with a barrel bridge.
Setting the Time
To set the time, pull the crown outwards [crown-pull-symbol] and rotate it to the desired position.
Time Measurement & Winding Information
Mechanical Movements
Accuracy Measurement
Accuracy should be measured within a lapse of 10 to 60 minutes from full winding, using posture ① (Dial side up).
Posture Difference Accuracy
Accuracy is measured across four different postures:
- Dial side up
- 6 o'clock side up
- 9 o'clock side up
- 3 o'clock side up
To Make Full-Winded
The number of crown turns required to fully wind the mainspring varies by model:
| Model Series | Crown Turns |
|---|---|
| 90/91 | Turn the crown 40 times |
| 82/8N | Turn the crown 40 times |
| 6T | Turn the crown 20 times |
Winding Direction
The winding direction for different model series is indicated below:
- 90/91/6T: Clockwise winding [clockwise-arrow]
- 82/8N: Counter-clockwise winding [counter-clockwise-arrow]
