Jovvi international
| Delivery Time | 7-14days |
| Place Of Origin | China |
| Dielectric Test | 1000 V |
| Tip Corner Radius | <0.03 mm |
| Supply Ability | 300 Set / Month |
| Packaging Details | Carton&wooden Box |
| Tip Hardness | 38-42 HRC |
| Insulation Thickness | 2 mm |
| Blade Material | Grade 5 Ti (Ti‑6Al‑4V) |
| Handle Knurling Depth | 0.3-0.5 mm |
| Payment Terms | T/T |
| Certification | ISO |
| Brand Name | Jovi |
| Model Number | 1-cf-7 |
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Product Specification
| Delivery Time | 7-14days | Place Of Origin | China |
| Dielectric Test | 1000 V | Tip Corner Radius | <0.03 mm |
| Supply Ability | 300 Set / Month | Packaging Details | Carton&wooden Box |
| Tip Hardness | 38-42 HRC | Insulation Thickness | 2 mm |
| Blade Material | Grade 5 Ti (Ti‑6Al‑4V) | Handle Knurling Depth | 0.3-0.5 mm |
| Payment Terms | T/T | Certification | ISO |
| Brand Name | Jovi | Model Number | 1-cf-7 |
| Component | Material | Manufacturing Method | Quality Requirement |
|---|---|---|---|
| Blade | Grade 5 Ti (Ti‑6Al‑4V) | Swiss‑type CNC lathe + grinding | Concentricity <0.05 mm |
| Tip | Grade 5 Ti (same as blade) | Precision grinding (optical control) | Corner radius <0.03 mm (Phillips) |
| Handle (standard) | Brass (C36000) | Cast + CNC machined | Knurling depth 0.3–0.5 mm |
| Handle (insulated) | Brass core + rubber overmold | Injection molded (non‑magnetic rubber) | Dielectric test 1000 V |
| Tang | Grade 5 Ti (blade extension) | Integral (same piece as blade) | Full length through handle |
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:
Handle has inspection hole (2 mm diameter) at base
Titanium blade visible through hole
Magnet test: No attraction (steel core would attract)
Benefit: No hidden ferromagnetic components. Full torque transmission without handle separation.
| Handle Type | Material | Magnetic Susceptibility | Pros | Cons |
|---|---|---|---|---|
| Standard (knurled) | Brass (C36000) | ~0 (diamagnetic) | Non-sparking, durable, machinable | Heavier than plastic |
| Insulated | Brass + rubber overmold | ~0 + rubber (diamagnetic) | Electrical safety (1000 V) | Bulkier |
| Precision (small) | Anodized aluminum | ~2 × 10⁻⁵ | Lightweight, low cost | Less durable for heavy torque |
Jovvi uses brass for standard handles because it is non-magnetic, non-sparking, and provides sufficient mass for torque control.
| Test | Method | Pass Criterion |
|---|---|---|
| Initial hardness | Rockwell (HRC) on tip | 38–42 HRC |
| Wear test | Drive 500 screws into Ti test block (3 N·m torque) | Tip geometry change <0.05 mm |
| Cam-out test | Apply 10 N axial force, rotate at 5 N·m torque | No visible slippage after 100 cycles |
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:
Brass handle with integral blade tang (same as standard)
Rubber overmold (Viton® or EPDM) – injection molded at 180°C
Insulation thickness: 2 mm minimum (1000 V rating per IEC 60900)
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.
Company Details
Year Established:
2010
Total Annual:
10000000-20000000
Employee Number:
100~500
Ecer Certification：
Verified Supplier
Jovvi(Beijing Hengtai Tech Co., Ltd) was established in 2010. The company adheres to the development concept of “integrity all over the world and conducts all continents”, adheres to the business policy of “strive to create greater value for customers”, and is committed... Jovvi(Beijing Hengtai Tech Co., Ltd) was established in 2010. The company adheres to the development concept of “integrity all over the world and conducts all continents”, adheres to the business policy of “strive to create greater value for customers”, and is committed...
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