· Product Overview

• Solid 6061-T6 aluminum construction — lightweight, strong, non-magnetic, and thermally stable
• Dual-surface design:
  • Knurled grip zone: Diamond-pattern knurling (0.3 mm pitch, 0.15 mm depth) — maximizes torque transmission and slip resistance, even with gloves
  • Smooth barrel: Polished cylinder for visual contrast and smooth rotation
• Threaded end: M4 or M5 internal thread (flat-bottom or hex recess) — secure mounting without external fasteners
• Vibrant anodized finishes: 5 standard colors (Silver, Black, Gold, Red, Blue), all Type II anodized (15 μm, sealed), UV-stable (ΔE < 1.0 after 1,000 hrs QUV)
• Tight tolerances: ≤0.01 mm concentricity, ±0.005 mm knurl depth — ensures wobble-free rotation and consistent feel

· Core Specifications

· Application Scenarios

• Pro Audio & Studio Gear
  → Mixer channel faders, gain controls, EQ knobs
  → DAC/amp volume dials (color-coded by function: red = input, blue = output)
  → Monitor controller jog wheels
• Medical Devices
  → Infusion pump flow rate dials
  → Ultrasound machine parameter selectors
  → Surgical robot calibration knobs (316L stainless option available)
• Industrial HMI & Control Panels
  → Machine setting dials (CNC, laser cutters, packaging lines)
  → Calibration potentiometer knobs
  → Safety interlock selectors (color-coded per ISO 3864)
• Photography & Cinematography
  → Camera focus/aperture rings (custom knurl pattern for tactile feedback)
  → Gimbal controller dials
  → Lighting console intensity knobs
• Consumer Electronics
  → Smart home hubs (e.g., lighting dimmers, thermostat dials)
  → EV charging station interface knobs
  → Premium smartwatch side buttons (miniature version: Ø6 mm)

• Knurl + Smooth = Tactile + Aesthetic — users feel quality
• 5 Standard Colors = Brand Flexibility — no custom dye cost for core palette
• CNC from Billet = Zero Warpage — unlike cast or molded alternatives
• Custom in 5 days — no tooling fees, no MOQ, even for new colors

· Production Process Introduction

· Packaging and Shipping Methods

• Standard Packaging: 1 knob per anti-static PE bag; 500 per EPE tray; 5,000 per cardboard box.
• Bulk Options: 10,000–100,000+ units per pallet (custom foam inserts available).
• Shipping Methods:
  • 📦 Express (DHL/FedEx/UPS): 3–7 business days (global)
  • ✈️ Air Freight: 5–10 days (orders ≥ 2,000 pcs)
  • 🚢 Sea Freight: 20–35 days (container loads)
• White-Label Services:
  • Laser engraving (logo, scale, QR code)
  • Branded retail boxes or blister packs
  • Kitted solutions (e.g., “Control Kit”: 100 knobs + mounting screws + torque guide)

· Frequently Asked Questions (FAQ)

• Standard 5-color set (Silver/Black/Gold/Red/Blue): 500 pcs total (min 100 pcs per color)
• Single color (any standard color): 200 pcs
• Custom color (e.g., Pantone 286C, matte green): 500 pcs
• Samples: 5 pcs free for verified B2B customers (shipping paid)

• In-stock colors: 5–7 working days
• Custom color/size/thread: 7–10 working days (includes dye validation & FAI)
• Rush service (≤5 days): Available for +20% fee

• Knurl types: Diamond (standard), straight-line, cross-hatch, or custom 3D texture
• Threads: M3, M4, M5, UNC 4-40, or metric trapezoidal
• Sizes: Length 20–50 mm, OD 8–20 mm
• Features: Rubber overmolding (TPU, Shore A 50–70), LED window, magnetic coupling, or scale engravings
• Materials: 6061-T6 (standard), 7075-T6, 316L SS, brass, or titanium
• Finishes: Anodized (all colors), PVD coatings (TiN, CrN), or soft-touch coating

• Color fastness: QUV test (1,000 hrs) — ΔE < 1.0 (no visible fading)
• Knurl durability: 100,000 rotation cycles @ 3 N·m — no rounding, no loss of grip
• We provide: CMM report, wear test data, and color spectrophotometer certificate

• Medical: FDA 21 CFR 177.1010, USP Class VI, ISO 10993-5
• Consumer Electronics: RoHS 3, REACH SVHC, IEC 60601-1 (for medical variants)
• Cleanroom: Class 10,000 packaging; outgassing data available
• ESD-safe: Conductive anodize (surface resistivity 10⁴–10⁶ Ω/sq)

· Why Choose YITECH?