COLLARO SPRING MOTOR SPECIFICATIONS
Quick Reference Table
Collaro Ltd.
There are two lots of Collaro spring motors. Ones advertised in 1925 and the other lot advertised in 1930. Unlike Garrard who produced a plethora of motors, Collaro produced three basic designs and fitting them with either a single or double springs.
What distinguished them apart is their quality and the one piece frame. The frame seems to be cast in two pieces but then is fused at the factory. This meant that all motors parts could be individually removed or replaced without interfering with the rest of the parts. This feature also made Collaro motors cheaper to manufacture and being made in Britain also made them very popular and competitive with their imported rivals.
- Dates are subjective and are taken from advertisement and dated catalogues. It does however seem possible that the motors were names by the year they were released.
- Spring sizes and information is taken from an October 1954 Vulcan mainsprings catalogue re-printed in Talking Machine Review 22. It can be downloaded here at Archive.com. Spring ends are pictured below. Other spring manufacturers like EMO and Selecta have varying lengths for the same motor
- Please contact me for any corrections or errors
| Model | Date | Frame | Governor | Features | Spring # | Width x Thickness | Spring Length | Outer End | Inner End | Image |
|---|---|---|---|---|---|---|---|---|---|---|
| Collaro M1 | 1924/25 | One piece cast | Ball | First Collaro Motor | Single | 7/8” x 0.020" | 11' 6" | Pear | Hole |  |
| Collaro M2 | 1924/25 | One piece cast | Ball | Used in early EMG gramophones | Single | 7/8” x 0.022" | 11' 9" | Pear | Hole |  |
| Collaro M2a | 1924/25 | One piece cast | Ball | One piece frame | Double | 3/4” x 0.023" | 13' | Pear | Hole later Hub |  |
| Collaro M3a | 1924/25 | One piece cast | Ball | Vertical barrels | Double | 1 1/4” x 0.024" | 19' 8" | Keyhole | Hole |  |
| Collaro A27 | 1927 | One piece cast | Ball | Single | 7/8” x 0.024" | 10' 6" | Pear | Hub |  |
|
| Collaro C27 | 1930 46/- | One piece cast | Ball | Two-spring A27 | Double | 1” x 0.024" | 14' 9" | Pear | Hub |  |
| Collaro A28 | 1930 19/- | One piece cast | Ball | Improved winder mechanism | Single | 7/8” x 0.024" | 10' 6" | Pear | Hub |  |
| Collaro B28 | 1930 33/- | One piece cast | Ball | Two-spring A28 | Double | 3/4” x 0.023" | 8' 9" | Pear | Hub |  |
| Collaro A30 | 1930 19/- | One piece cast | Ball | Compact | Single | 7/8” x 0.022" | 8' 9" | Pear | Hole |  |
| Collaro B30 | 1930 28/- | One piece cast | Ball | Two-spring A30 | Double | 3/4” x 0.023" | 8' 10" | Pear | Hub |  |
| Collaro D30 | 1930 | One piece cast | Ball | Larger B30 | Double | 1” x 0.028" | 15' 6" | Pear | Hub |  |