Past Projects
STAINLESS STEEL LOW PROFILE CANNULATED SHORT THREAD SCREW
Swiss Machine
B&J Medical is a premiere contract manufacturer of high quality medical devices and instruments, specializing in high precision and tight tolerances. In the project profiled here, a low profile cannulated short thread screw, also called a bone screw, was manufactured utilizing a state of the art Swiss lathe and ram EDM equipment. Precision milling and turning processes were applied to 316 stainless steel in order to create the customer specified configuration, maintaining a tight tolerance of +0.001” / -0.000” throughout. This unit is intended to stabilize and aid in the fixation of fractures and fusions. The thread screw was treated with electropolishing and passivation processes for impurity removal and longevity, and left with a raw machined surface finish. Parts were thoroughly inspected for quality and accuracy using CMM, visual, and dimensional inspections.
The completed thread screw dimensions were 4.0 mm in diameter and 60 mm in length, with a head diameter of 0.216 mm, a minor thread diameter measuring 0.102 mm, and major thread diameter of 0.157 mm. 425 units were produced after a turnaround time of 5 to 6 weeks, packaged and shipped according to customer specifications.
Project Highlights
Product Description Bone Screw
Swiss Machining & EDM Capabilities Applied/Processess Primary:
Swiss Machining
Sinker EDM
Secondary:
Electropolishing
Passivating
Equipment Used to Manufacture Part Swiss Lathe, Ram EDM
Overall Part Dimensions Length: 60 mm
Head Diameter: 0.0216 mm
Minor: 0.102 mm
Major: 0.157mm
Tightest Tolerances + 0.001" / -0.000"
Material Used 316 Stainless Steel
Material Finish Raw / Machined
In Process Testing / Inspection Performed CMM Inspection, Dimensional Inspection, Visual Inspection
Industry for Use Medical
Volume 425
Delivery / Turnaround Time 5 - 6 weeks total completion
Standards Met Customer Specifications, 2D CAD Drawing ISO 13485
Product Name 4.0 x 60mm Low Profile Cannulated Short Thread Screw