J & J Machine, Inc.

United States

• Width29 in 736.6 mm
• Height29 in 736.6 mm
• Length60 in 1524 mm

J&J Machine provides vertical and horizontal milling services for a variety of industrial applications. While we do extensive work for the aerospace, medical, military, and semi-conductor industries, we also provide services for marine, packaging, electronic, agricultural, automotive, and energy clients, and use and manufacture vacuum fixtures. Our customers turn to us for everything from sculptingsurfacing and pocketing of components, to tapping and thread milling, for parts up to 60 inches in length, 29 inches in width, and 29 inches in height. We can accommodate volumes from prototypes to 1 million pieces and work to client specifications when it comes to tolerances. Our vast abilities allow us to work with a wide variety of metal and plastic materials.

• Pocket Size:Diameter: Ø.560" Depth: 8.642"
• DimensionsLength: 2.000" Width: 4.180" Height: 9.875"
• Max Material Finish8 Micro

A customer in the semiconductor industry was in need of precision CNC milling which was to be performed on an existing component. The part was composed of PFA-450 fluoropolymer, a type of thermoplastic, which possesses non-stick and friction reducing properties. This project required milling of a pocket that was 8.642" deep, with a diameter of .560". Due to the process specifications milling on this type of material causes tool chatter which greatly reduces the precision of the finished product. J & J Machine developed a process to modify the geometry of the tooling to overcome this obstacle, and was able to eliminate chatter entirely during production. The finished part maintained tolerances of +- .006" on the pocket width and height.

• DimensionsLength: .750" Width: 1.500" Height: 7.900"
• Material Used6AL4V Grade-5 Titanium
• Tightest Tolerances±.015"

This customer needed J&J to create a 6.000" deep Ø.2845" diameter blind hole into grade 5 titanium, and finish it with a 516-24 thread. With a #63 micro finish, and tolerances of ±.015", this was no easy task. Heat being a major concern, we had to develop a method that would not allow work hardening. In addition, removal of chips from a 6" deep hole of such a small diameter was also an issue.

• VolumePrototype thru Production
• Tightest Tolerances±.001"
• Material UsedPFA-450 Fluoropolymer

J&J Machine's state of the art facility is equipped with the cutting edge equipment, and skilled machinists, that allows us to work with a variety of materials and sizes. A client in the semiconductor industry required quality CNC milling of a large diameter plastic part. Measuring 27" in diameter, and 1" in thickness, it was composed of fluropolymer, and required finished thicknesses from 1.000" to .118", with a #63 micro finish, all while holding tolerances of ±.001".