J & J Machine, Inc.

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

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

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

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.

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