Screwdriver tip geometry determines cam‑out resistance (slipping out of fastener). Jovvi uses CNC optical grinding with in-process vision inspection.

Phillips tip:

• Cross recess grinding: 4 flutes, 90° included angle

• Tip point: Conical with 0.2–0.3 mm flat (prevents bottoming out)

• Corner radius: <0.03 mm (sharp edges grip fastener)

• Inspection: 50× optical comparator – overlay with master profile

Torx tip:

• 6-lobe star pattern ground in one operation (indexed spindle)

• Tolerances: Across-points (e.g., T20 = 3.86–3.94 mm)

• No coating – bare titanium provides sufficient wear resistance

Flathead tip:

• Parallel ground faces (taper <0.02 mm over 10 mm length)

• Tip thickness: 80% of slot width (prevents spreading slot)

Many “titanium” screwdrivers use a titanium-coated steel blade or a short titanium tip welded to steel shank. Jovvi uses solid Grade 5 Ti blade extending full handle length.

Verification method:

1. Handle has inspection hole (2 mm diameter) at base

2. Titanium blade visible through hole

3. Magnet test: No attraction (steel core would attract)

Benefit: No hidden ferromagnetic components. Full torque transmission without handle separation.

Jovvi uses brass for standard handles because it is non-magnetic, non-sparking, and provides sufficient mass for torque control.

Failure mode: Tip corners round (Phillips) or points wear (Torx). Jovvi screwdrivers typically last 5,000–10,000 cycles – far exceeding brass (<500) or ceramic (<2,000).

For live electrical work inside MRI console (e.g., 120 VAC, 24 VDC), Jovvi offers insulated screwdrivers.

Construction:

1. Brass handle with integral blade tang (same as standard)

2. Rubber overmold (Viton® or EPDM) – injection molded at 180°C

3. Insulation thickness: 2 mm minimum (1000 V rating per IEC 60900)

4. Dielectric test: 10,000 V for 3 minutes (pass if no breakdown)

Note: Insulation is non‑magnetic (rubber contains no ferromagnetic fillers). Use for magnet room electrical panels outside 0.5 m fringe field.