Bridgeport J-Head Series, Manual

Page: 5 / 69

Hoffman Mechatronics Bridgeport Mill J1 Rebuild
Table of Figures
Figure 1 - Mill ID Plate ................................................................................................................................ 8
Figure 2 - J Head Figure 3 - Table and Knee ...................................................................................... 9
Figure 4 - Grub Screws, note the hollow locking screw. .......................................................................... 11
Figure 5 - Motor Nuts................................................................................................................................ 12
Figure 6 - Drive Housing Assembly.......................................................................................................... 14
Figure 7 - Power Head Mounting ............................................................................................................. 15
Figure 8 - Drive Housing Timing Belt ....................................................................................................... 15
Figure 9 - Bolts Fastening Drive Housing Together ................................................................................. 16
Figure 10 - Drive Housing Inspection ....................................................................................................... 16
Figure 11 - Gear Housing Cover .............................................................................................................. 17
Figure 12 - J-Head.................................................................................................................................... 18
Figure 13 - J-Head Mounting.................................................................................................................... 19
Figure 14 - Overload Lever Plunger and Spring ...................................................................................... 21
Figure 15 - Overload Clutch Ring and Circlip........................................................................................... 21
Figure 16 - Ball Reverse Lever, and Quill Stop Trip Lever....................................................................... 22
Figure 17 - Homemade Spanner Nut Wrench.......................................................................................... 24
Figure 18 - Note the Axial Alignment Asterisk and the Bearing Orientation ............................................ 25
Figure 19 - Note the alignment marks on outer races preparing for next step......................................... 26
Figure 20 - Aligning with Nosepiece Screw Hole ..................................................................................... 27
Figure 21 – Homemade Spanner Nut Wrench ......................................................................................... 27
Figure 22 - Worm Gear Cradle Assembly ................................................................................................ 29
Figure 23 - Feed Driving Gear Assembly ................................................................................................. 29
Figure 24 - Reverse Feed Gear Assembly............................................................................................... 30
Figure 25 - Reverse Feed Gear Removal ................................................................................................ 31
Figure 26 - Ram Adapter .......................................................................................................................... 32
Figure 27 - Ram Assembly ....................................................................................................................... 33
Figure 28 - Turret Base and Ram Lock .................................................................................................... 33
Figure 29 - Ram Installation ..................................................................................................................... 34
Figure 30 - Ram Sliding Fixture................................................................................................................ 35
Figure 31 - Turret Bolts and Cross Member............................................................................................. 36
Figure 32 - Turret Reassembly................................................................................................................. 36
Figure 33 - Turret Cross Member ............................................................................................................. 37
Figure 34 - Table Handle, Dial and Nut.................................................................................................... 38
Figure 35 - Broken Bracket....................................................................................................................... 39
Figure 36 - Bearing Bracket with Bearings Installed ................................................................................ 40
Figure 37 - Gib Adjusting Screw............................................................................................................... 40
Figure 38 - Gib Parallels........................................................................................................................... 40
Figure 39 - Y-Axis Chip Wiper Cover ....................................................................................................... 41
Figure 40 - Y-Axis Gib and Adjusting Screw ............................................................................................ 41
Figure 41 - Table Nearly Ready for Removal........................................................................................... 43
Figure 43- Saddle ..................................................................................................................................... 45
Figure 44- Lead Screw Nut....................................................................................................................... 45
Figure 45- Lead Screw Nut Bracket ......................................................................................................... 46
Figure 46- Knee Gib Area......................................................................................................................... 48
Figure 47– Removing/Reinstalling the Knee ............................................................................................ 49
Figure 48 - After the Crank and Dial have been Removed ...................................................................... 49
Figure 49 - Knee Elevating Bevel Gears .................................................................................................. 50
Figure 50 - Elevating Screw Bearing Retainer Ring................................................................................. 50
Figure 53 - Feed Nut Bracket ................................................................................................................... 54
Figure 54 - Feed Trip Lever...................................................................................................................... 55
Figure 55 - Spindle and Back Gear Lube Cups........................................................................................ 55
Figure 56 - Way Lube Fittings .................................................................................................................. 56
BPJ1RBLD_002 4
January 31, 201111