Hoffman Mechatronics
Bridgeport Mill J1 Rebuild
4.6.1 Feed Driving Gear Assembly Removal
To disassemble this unit, you will need to first remove the Cluster Gear Shift Fork Cover and the
Feed Engagement Cover. You can then remove the Worm Gear Cradle Assembly. The Worm
Gear Cradle Assembly is held in place by the Worm Gear Cradle Grub Screws as shown in
Figure 23, and the nut on the top of the Input Shaft. The top of the Input Shaft is shown in Figure
22.
Feed Engagement
Cover
Worm Gear Cradle &
Input Shaft (retaining
nut has been removed )
Figure 22 - Worm Gear Cradle Assembly
Once you have removed the Worm Gear Cradle Assembly, you can remove the rest of the Feed
Driving Gear Assembly. Start by removing the grub screws that secure the Cluster Gear Shaft as
illustrated in Figure 23 below. You start by removing the Input Shaft first, then using the hole
created by removing this shaft to assist with the removal of the Cluster Gear Shaft. Note that
once these shafts have been removed, you may now remove the remaining ring gear from the
Quill Feed Pinion Shaft.
Cluster Gear Input
Shaft Needle Bearing
Cluster Gear Input
Shaft
Sliding Gear Assembly
on the Cluster Gear
Shaft
Cluster Gear Shaft
Grub Screws on Top
Worm Gear Cradle
Grub Screws
Figure 23 - Feed Driving Gear Assembly
BPJ1RBLD_002
29
January 31, 201111