chrisginottawa:
Assembled to table top. Bobbin wider moved to meet belt. Pulleys sit on four 1/4” brass spacers to clear carriage bolt head.
chrisginottawa:
Designing a speed reduction for my Singer 211
chrisginottawa:
Speed reducer assembly! You can see how close together I squeezed the 2 pulleys.
chrisginottawa:
3/4” brass bearing shaft with pulleys fitted. You can see the two 5/8” shoulders the bearings seat against.
chrisginottawa:
Reducing the cast iron pulley width to keep belts close together. Cast iron is messy!
chrisginottawa:
Tapping #10-32 holes in the brass bearing shaft for bearing clamping end caps. The cap screws to the brass shaft, compressing the inner sealed bearing flange.
chrisginottawa:
Widening the drive belt slot for an extra drive belt. The boards limit the router travel for a clean cut.
chrisginottawa:
Checking the countersink depth in the bearing end cap. I use a precision ground tool bit to locate the small part square to the chuck face.