main drive gear

The top platform contains the motor assembly and the main drive gear, while the bottom holds the step return idler sprockets.

In an escalator, the handrail is pulled along its track by a chain that is connected to the main drive gear by a series of pulleys.

Not bad, eh? MAIN DRIVE GEAR The auto-rotation unit and main drive gear are completed next.

Tri-ang Synchrosmoke Jinty Chassis with Smoke Unit The smoke was forced out through the chimney by a piston driven by a rod and gear wheel running on the main drive gear.

The hedgerow trees accepted today as part of the familiar landscape were not planted by farmers for visual effect, they were crops and the wood was used for building and fencing and the millers needed beech or hornbeam wood for mill machinery, in particular for the sacrificial cogs on the main drive gears.