Spare gear.
（
Machinery.) Extra parts carried in steamers to replace any portions of the machinery which may be broken or injured at sea.
The following is a list of tools and spare gear for a naval tender, and may serve as an illustration:—
list of tools and spare articles for engines (with screw-propellers) of 450 horse-power.
Engineers' Tools.
| No. |
| Brushes, for boiler-tubes, to every 100 horse-power. | 20 |
| Drifts, short and long, to every 100 horse-power. | 1 each. |
| Fire-irons. | 12 |
| Mandrels, to every 100 horse-power. | 1 each. |
| Scrapers, circular and forked, to every 100 horse-power. | 5 each. |
| Spanners and wrenches, of sports. | 24 |
| Stocks, taps, and dies, from 1/2 to 1 1/4 inch. | 1 set. |
Spare Gear.
| Air-pump side-rods, with straps and brasses complete (if so fitted). | 2 |
| Air-pump rod. | 1 |
| Air-pump cross-head (if so fitted). | 1 |
| Bars, furnace. | 1/2 set. |
[
2254]
| No. |
| Bearers. | 3 |
| Boiler-plates. | 6 cwt. |
| Bolts and nuts for engines, properly assorted. | 120 |
| Cylinder-lid. | 1 |
| Cylinder cross-head (if so fitted). | 1 |
| Ferrules for boiler-tubes, to every 100 horse-power. | 50 |
| Piston and rod. | 1 |
| Propeller and shaft complete. | 1 |
| Rod, connecting, with strap and brasses complete. | 1 |
| Rod feed-pump (if so fitted). | 1 |
| Rod bilge-pump if so fitted) | 1 |
| Rod-slide. | 1 |
| Screws, packing, for slides, complete for one engine. | 1 set. |
| Springs for each piston (if so fitted). | 1 set. |
| Springs for other parts of engines, for one engine. | 1 set. |
| Tubes, boiler, to every 100 horse power. | 10 |
| Tubes, glass, for barometers. | 2 |
| Valve, foot, without seat. | 1 |
| Washers, iron. | 100 |
The term is equally applicable to the parts of any machine which may be duplicated.
