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Gantry Bridge

Assembly

The moving bridge that spans the bed on two uprights and carries the crossrail. It traverses the full bed length on the X rails. Symmetry and box-section stiffness keep the bridge square as it moves.

Direct parts	7
Class	Assembly

The moving bridge that spans the bed on two uprights and carries the crossrail. It traverses the full bed length on the X rails. Symmetry and box-section stiffness keep the bridge square as it moves. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Bill of materials for Gantry Bridge

7 top-level lines as of r71998

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Bridge Upright	gmm-upright	2×	2	·	part
2	Crossbeam	gmm-crossbeam	1×	1	·	part
3	X Truck	gmm-x-truck	4×	4	·	part
4	X Drive Pinion	gmm-x-pinion	2×	2	·	part
5	Helical Gear Pair	gear-pair	2×	2	·	part
6	Ball Bearing	ball-bearing	8×	8	·	part
7	Fastener Set	fastener-set	1×	1	·	part