Description
Overview:
This crankcase bearing bush is a genuine BSA component for the 220 cc Model D industrial engine, supplied to OEM specification under part number 86 3693. It is a precision plain bearing, typically manufactured from a wear‐resistant bronze alloy, that supports the crankshaft within the crankcase to maintain correct running clearance and oil film. The bush is undersize by 0.010 in (0.254 mm), making it suitable for engines with a crankshaft journal ground by the same amount during overhaul. It is intended for press-fitting into the crankcase and, as with most bushes, may require final sizing after installation to achieve the correct clearance. Ideal for keeping vintage BSA industrial engines running smoothly in tools and machinery such as mixers, pumps, and generators.
Key Features:
- Genuine BSA part for assured fit and function (OEM No. 86 3693)
- 0.010 in (0.254 mm) undersize to suit a reground crankshaft journal
- Precision-machined bronze construction for durability and stable oil film
- Restores correct bearing clearance to reduce friction, noise, and wear
- Press-fit design for secure location and accurate crankshaft support
- May require line-reaming or honing after installation for final sizing
- Suitable for engine rebuilds, restorations, and preventative maintenance
- Supplied as unused old stock; may show storage tarnish without affecting performance
Typical Applications:
Used during overhaul or repair of BSA Model D 220 cc industrial engines to renew the main bearing support in the crankcase. Common in engines powering site mixers, generators, pumps, agricultural equipment, and other stationary machinery where reliable crank support and oil control are essential.
Also known as:
Main bearing bush, crankshaft bush, crankcase bushing, engine bearing bush, undersize main bush, U/S 0.010 in bush (0.254 mm), plain bearing sleeve.
Fits Models:
BSA 220CC Model D
Product Specifications
| L&S Part No. | 86 3693 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | BSA |
| OEM No. | 86 3693 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Villiers |
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