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Non Magnetic Tool Kit Designed for MRI Engineering with Titanium Wrenches Screwdrivers and Hex Keys for Safe and Precise Operations

  • Non Magnetic Tool Kit Designed for MRI Engineering with Titanium Wrenches Screwdrivers and Hex Keys for Safe and Precise Operations
Brand Name Jovi
Certification ISO
Model Number 1-cf-7
Minimum Order Quantity 1set
Price $1200-$1580
Packaging Details Carton&wooden Box
Delivery Time 7-14days
Payment Terms T/T,L/C
Supply Ability 300 Set / Month
Product Details
Magnetic Susceptibility < 5 × 10⁻⁶ (Grade 5 Ti) Tip Hardness 38-42 HRC (Grade 5)
Max Torque 10 N*m (Torque Wrench) Blade Length 100 Mm (Standard Screwdriver)
Hex Key Size 1.5-10 Mm (L-Style) Insulation Rating 1000 V (Insulated Screwdriver)
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Product Description
Jovvi Non-Magnetic Titanium Tool Kit for MRI Engineering – Version 6 (Deep Dive: Wrenches, Screwdrivers & Hex Keys)
1. Quality – Material & Geometry Requirements for MRI Tools

Not all wrenches, screwdrivers, or hex keys perform equally in the MRI environment. Jovvi specifies three critical quality parameters for each tool type:

Parameter Requirement for MRI Safety Jovvi Titanium Compliance
Magnetic susceptibility (χ) < 10 × 10⁻⁶ (no artifact) < 5 × 10⁻⁶ (Grade 5 Ti)
Tip hardness (HRC) ≥ 35 (prevents stripping) 38–42 HRC (Grade 5)
Non‑sparking Required for oxygen‑rich MRI suites Yes (Ti does not spark)
Corrosion resistance Withstand contrast media (gadolinium) Excellent (passive oxide layer)

Jovvi guarantee: Every wrench, screwdriver, and hex key is 100% X‑ray inspected for internal ferromagnetic components (e.g., steel core in coated “titanium look” tools).

2. Application Scenarios – Tool‑Specific Use Cases in MRI Engineering
Wrenches – For MRI Magnet Cover, Gradient Coils & Cryostat Ports
Wrench Type Common MRI Application Torque Requirement Jovvi Model Titanium Grade
Open‑end wrench Helium vent line nuts (size 14–19 mm) 10–25 N·m JOW‑14 to JOW‑19 Grade 5, 100% Ti
Box‑end wrench (12‑point) Gradient coil mounting bolts (size 10–13 mm) 15–30 N·m JOWB‑10 to JOWB‑13 Grade 5, 100% Ti
Combination wrench Patient table rail fasteners (size 8–15 mm) 5–20 N·m JOWC‑8 to JOWC‑15 Grade 5, 100% Ti
Torque wrench (adjustable) Cryostat port nuts (critical: 8 N·m max) 1–10 N·m JOTW‑10 Grade 23 Ti beam + Be‑Cu spring
Socket wrench (ratchet) RF shield copper mesh fasteners (size 6–13 mm) 2–10 N·m JOR‑14 (1/4″ drive) Ti body + Be‑Cu gears
Crowfoot wrench (open‑end attachment) Hard‑to‑reach cryostat sensors N/A (for use with torque wrench) JOCF‑10 to JOCF‑15 Grade 5, 100% Ti

Why titanium for wrenches?

  • Brass wrenches are too soft – jaw spreads under torque >15 N·m.

  • 316 stainless wrenches cause artifacts and become magnetic after cold working.

  • Titanium provides steel‑like strength with zero magnetic susceptibility.

Jovvi ProTip for open‑end wrenches: Always pull, never push. Titanium has slight flex (modulus 110 GPa vs. steel 200 GPa). Pulling keeps the jaw engaged; pushing can spread the jaw.

Screwdrivers – For RF Coils, Control Console & Accessory Mounts
Screwdriver Type Tip Size Common MRI Application Shank Material Handle Material Jovvi Model
Phillips #0, #1, #2 RF coil cover screws, patient table panels Grade 5 Ti Brass (knurled) JOPH‑0,‑1,‑2
Flathead (slotted) 3 mm, 5 mm, 6 mm Control console chassis, accessory mounts Grade 5 Ti Brass (knurled) JOFL‑3,‑5,‑6
Torx (star) T6, T8, T10, T15, T20, T25, T30 Magnet cover panels, gradient coil fasteners (Tamper‑resistant) Grade 5 Ti Brass (knurled) + color‑coded ring JOTX‑6 to JOTX‑30
Hex (socket) screwdriver 2 mm, 2.5 mm, 3 mm, 4 mm RF coil tuning screws, small set screws Grade 5 Ti Brass (knurled) JOHS‑2,‑2.5,‑3,‑4
Precision screwdriver set Phillips #000, #00; Flat 1.5 mm, 2 mm Animal MRI coil adjustments, small device repair Grade 5 Ti Aluminum (anodized) JOPS‑4 (4 tools)
Insulated screwdriver Phillips #2, Flat 5 mm Live electrical work inside MRI console (non‑magnetic insulation) Grade 5 Ti with ceramic coating Rubber grip (non‑magnetic) JOIS‑P2,‑F5

Why titanium for screwdrivers?

  • Ceramic screwdrivers are non‑magnetic but brittle – tips chip easily.

  • Brass screwdrivers are too soft – tip deformation after 50–100 uses.

  • Titanium screwdrivers maintain tip geometry for thousands of cycles.

Jovvi design feature: Tang‑through construction – the titanium blade extends the full length of the brass handle, allowing high torque without handle separation. Many “titanium” screwdrivers from competitors have steel tangs (hidden ferromagnetic risk).

Hex Keys (Allen Wrenches) – Most Frequently Used MRI Tool

Hex keys are the most common tool in MRI engineering – used for magnet covers, RF coils, gradient panels, patient table adjustments, and accessory mounts.

Hex Key Type Size Range (metric) Common MRI Application Jovvi Model Special Feature
L‑style (standard) 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm General service – covers, panels, mounts JOHL‑9 (9 pcs) Ball end on long arm (allows 25° angle entry)
L‑style (short arm) 1.5, 2, 2.5, 3, 4, 5, 6 mm Tight spaces (inside RF coil housing) JOHL‑S7 (7 pcs) Short arm 25 mm, long arm 75 mm
T‑handle 2, 2.5, 3, 4, 5, 6 mm High‑torque applications (stubborn screws) JOHT‑6 (6 pcs) Ergonomic grip, 150 mm shaft
Hex bit (1/4″ hex drive) 2, 2.5, 3, 4, 5, 6 mm For use with ratchet or torque wrench JOHB‑6 (6 pcs) 25 mm length, color‑coded rings
Extra‑long (200 mm shaft) 2, 2.5, 3, 4 mm Deep recessed screws (cryostat access) JOHX‑4 (4 pcs) Ball end on long arm only
Micro hex keys 0.7, 0.9, 1.3 mm Animal MRI coil tuning, small device repair JOHM‑3 (3 pcs) Precision ground tips

Why titanium for hex keys?

  • Brass hex keys strip within 10–50 uses (brass hardness 20–25 HRC vs. titanium 38–42 HRC).

  • 316 stainless hex keys are harder (55 HRC) but:

    • Become weakly magnetic after use (work hardening)

    • Cause artifacts if dropped near bore

    • Risk of ferromagnetic fragmentation if broken

  • Titanium hex keys offer the “sweet spot”: non‑magnetic, durable, and safe.

Jovvi ProTip for hex keys: When using ball end at an angle, apply only 50% of normal torque. The ball end has smaller contact area – overtightening will strip the screw head, not the hex key.

3. Tool Variety – Detailed Specifications by Tool Type
Jovvi Wrench Specifications
Parameter Open‑End Wrench Box‑End Wrench Combination Wrench Torque Wrench
Material Grade 5 Ti Grade 5 Ti Grade 5 Ti Grade 23 Ti + Be‑Cu spring
Finish Bead blasted Bead blasted Bead blasted Polished beam
Jaw angle 15° offset 0° (straight) 15° open end, 0° box end Fixed head
Length (size 10 mm) 120 mm 120 mm 140 mm 200 mm
Thickness (jaw) 4 mm 5 mm (wall) 4 mm / 5 mm N/A
Marking Size laser‑etched Size laser‑etched Size laser‑etched N·m scale engraved
Max torque rating (size 10 mm) 30 N·m 40 N·m 35 N·m 10 N·m
Jovvi Screwdriver Specifications
Parameter Standard (Phillips/Flat) Torx Precision Insulated
Blade material Grade 5 Ti Grade 5 Ti Grade 5 Ti Grade 5 Ti + ceramic coating
Handle material Brass (knurled) Brass + color ring Aluminum Rubber over brass
Handle length 90 mm 90 mm 70 mm 100 mm
Blade length 100 mm (standard), 150 mm (long) 100 mm 50 mm 100 mm
Tang construction Full tang Full tang Full tang Full tang
Max torque (#2 Phillips) 5 N·m 5 N·m (T20) 1 N·m 4 N·m
Insulation rating N/A N/A N/A 1000 V (non‑magnetic)
Jovvi Hex Key Specifications
Parameter L‑Style (Standard) T‑Handle Hex Bit Micro
Material Grade 5 Ti Grade 5 Ti (shaft), Brass (handle) Grade 5 Ti Grade 5 Ti
Long arm length (size 3 mm) 100 mm 150 mm 25 mm (bit only) 80 mm
Short arm length (size 3 mm) 25 mm N/A N/A 20 mm
Ball end Yes (long arm) Yes (optional) No No
Finish Bead blasted Polished shaft Bead blasted Precision ground
Color coding None (laser size) Handle color by size Ring color by size None
Max torque (size 3 mm) 6 N·m 8 N·m 5 N·m (with ratchet) 2 N·m
4. Production Assurance – Tool‑Specific Testing

Jovvi performs tests beyond general ferromagnetic screening for each tool category:

Wrench Testing
Test Method Pass Criterion
Jaw spread (open‑end) Apply rated torque × 1.5 for 10 seconds Permanent deformation < 0.1 mm
Box‑end wall flex Apply rated torque × 2.0 No cracking
Torque wrench calibration 5 points across range (1, 3, 5, 7, 9 N·m) ±5% of reading
Corrosion (salt spray) ASTM B117, 48 hours No red rust (titanium unaffected)
Screwdriver Testing
Test Method Pass Criterion
Tip hardness Rockwell (HRC) on 3 samples per batch 38–42 HRC
Tip torsion Apply increasing torque until failure Failure > 2× rated torque
Tang pull test Pull tang axially with 500 N force No separation
Magnetic susceptibility SQUID magnetometer (ASTM F3042) < 5 × 10⁻⁶
Hex Key Testing
Test Method Pass Criterion
Corner radius inspection Optical comparator (50× magnification) Corner radius < 0.05 mm
Torque to strip Insert into Grade 5 Ti test screw, apply torque Stripping occurs at screw, not hex key
Ball end retention 1000 cycles at 25° angle, 50% rated torque No ball end deformation
Dimensional accuracy Micrometer measurement across flats (size 3 mm) 2.98–3.02 mm
5. Selection Guide – Which Tool for Which MRI Fastener?
Fastener Type Fastener Material Recommended Jovvi Tool Why
M3–M6 socket head cap screw (steel) 316 stainless Hex key (L‑style) Titanium on steel – no galling
M3–M6 socket head cap screw (titanium) Grade 5 Ti Hex key with anti‑galling paste Ti‑on‑Ti requires lubricant
Torx flat head (M4) Steel Torx screwdriver (T20) Torx resists cam‑out
Phillips #2 (M4) Brass / plastic Phillips screwdriver (#2) Low torque – brass handle sufficient
Hex nut (M8–M12) Steel Combination wrench Open end for starting, box end for final torque
Cryostat port nut (14 mm hex) Invar (low thermal expansion) Torque wrench + socket Precision torque critical (8 N·m max)
Set screw (M2–M3) Stainless steel Hex key (2 mm, 2.5 mm) Short arm for access
6. Common Mistakes When Using Titanium Tools
Mistake Consequence Prevention
Using Ti hex key in Ti screw without lubricant Galling (cold welding) Apply Jovvi anti‑galling paste every 10 insertions
Pushing on open‑end wrench (instead of pulling) Jaw spread Always pull toward open end
Using ball end of hex key for final torque Stripped screw head Use straight end for final tightening
Overtorquing cryostat nut (torque wrench not used) Thread damage – helium leak Always use torque wrench (JOTW‑10)
Using Phillips screwdriver at angle Cam‑out, tip damage Keep driver aligned with screw axis
Storing hex keys loose with steel tools Ferromagnetic contamination Store in Jovvi ABS case
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