Milling Machine -- Bridgeport J-Head (White)

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|location          = Machine Shop
|location          = Machine Shop
|species = Milling Machines
|species = Milling Machines
|reservations = {{Asylum Tool Reservation}}
|owner = [[SCUL]]/SadieBlake
|owner = [[SCUL]]/SadieBlake
|tool_categories =  
|tool_categories =  

Current revision as of 18:40, 16 December 2018

Tools at the Asylum
White Bridgeport J Head Knee Mill

Bridgeport Mill (white)

General Info
Mfr. Specs
Training (experimental section)
Tool SpeciesMilling Machines
(Includes rubric, training information, and testing information.)
Asylum Info
LocationMachine Shop
Operational Status
Latest Status
QR Code

This is one of two manual Bridgeport J-head mills in the machine shop. The other is: Milling Machine -- Bridgeport J-Head (Blue)



This mill takes R8 compatible tools. All collets and drill chucks are on the workbench adjacent to the mill:

R8 collets and drill chucks in a rack

Special Notes

  • Quill return spring is shot - quill can drop if it is too heavy.
  • Y-axis lock is busted off and cannot be repaired. Use the blue mill if you need a Y-lock.


  • J-head diagram


  • X-axis gib adjusted. Vandykee 01:08, 17 December 2010 (EST)
  • Initial lubrication performed. Vandykee 12:37, 6 January 2011 (EST)

Lubrication Schedule

  • Oil Spindle with Mobil Vactra Light Oil weekly.
  • Oil Transmission with Mobil Vactra Medium Oil weekly.
  • Oil Ways with Mobil Heavy Way Oil.
  • Grease motor yearly.
  • Fun reminder: WD-40 is not a lubricant.


Staple Consumable: Spindle Oil
SpecificationsPart Number(s)Product Link(s)

Cost: $23.87 / gal (with asylum discount)

Mobil Velocite #10 Spindle Oil

  • Prefer velocite #10 over #6, since #10 is more viscous and supposedly better for spindles slower than 6k rpm.
  • Do not pay attention to the really old manuals which recommend Mobil Vactra Heavy-Medium oil.
  • Mfr Part #: 101230
  • MSC Part #: 60002136

Staple Consumable: Transmission Oil
SpecificationsPart Number(s)Product Link(s)

Cost: N/A

Mobil Vactra Medium Oil



Staple Consumable: Way Oil
SpecificationsPart Number(s)Product Link(s)

Cost: $21.99 / gal (with asylum discount)

Mobil Vactra #2 Way Oil

  • Mfr Part #: 100772
  • MSC Part #: 60002151
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