Brother 1270N - Manual (Page 181)

APPENDIX
A-3
APPENDIX 2. DIAMETER / CIRCUMFERENCE OF ROLLERS
The diameter and circumference of each roller are listed below;
No. Parts Name Diameter (Circumference)
1 Paper Feed Roller
φ
14.0 mm (44.0 mm)
2 Transfer Roller
φ
15.20 mm (47.7 mm)
3 Photosensitive Drum
φ
29.97 mm (94.1 mm)
4 Heat Roller
φ
25.0 mm (78.5 mm)
5 Pressure Roller
φ
20.0 mm (62.8 mm)
6 Development Roller
φ
20.0 mm (39.0 mm)