Custom Handles & Knobs Manufacturing
From heavy-duty machine levers to precision instrument dials — we engineer, cast, machine, and assemble components to your exact specifications. A single-source solution from design to finished parts.
Annual Capacity
On-Time Delivery
Tolerance
Client Focus
Common Manufacturing Materials
Allied Metal casts 100+ alloys and engineering plastics — including stainless steel, carbon steel, aluminum, copper-based alloys, nickel alloys, and high-performance thermoplastics — to meet a wide range of application requirements.
Aluminum
Ideal for aircraft cockpit handles, portable equipment levers, EV battery knobs, and instrument dials
Stainless Steel
Perfect for medical instrument handles, surgical knobs, food processing levers, and marine hardware
Brass
Commonly used in RF tuning knobs, terminal block levers, quick-connect handles, and instrument dials
Zinc Alloy
Great for die-cast star knobs, decorative handles, lock housings, and furniture hardware
Carbon & Alloy Steel
Built for high-pressure valve handles, industrial levers, mining controls, and toggle handles
Superalloys
Designed for high-temperature valve controls, chemical processing knobs, marine handles, and furnace door levers
Nylon (PA)
Excellent for over-molded grips, quiet knobs, vibration-damping inserts, and medical handles
POM (Acetal)
Preferred for precision instrument dials, gear knobs, thumb wheels, and lab micro-adjust handles
PEEK
Trusted for surgical handles, autoclavable knobs, oven door handles, and laboratory controls
ABS
Widely used for operator panel knobs, device housings, protective guards, and appliance controls
PC (Polycarbonate)
Ideal for clear instrument covers, viewport handles, light-guide knobs, and display controls
Don’t see the material you need? Contact our materials engineering team — we’ll evaluate custom alloys or specialty plastics for your application.
Component Types We Produce
From standard to highly customized — covering the full spectrum of industrial control components.
- Handles & Levers
- Star knobs & handles
- Adjustable levers
- Drawer pulls
- Wing nuts
- Control Knobs
- Knurled knobs
- Ratcheting knobs
- Instrument dials
- T-nuts
- Ergonomic Parts
- Soft-touch grips
- Operator panels
- Joystick housings
- Safety guards
- Functional Hardware
- Heavy-duty hinges
- Quick-release latches
- Leveling feet
- Cable glands
Process capabilities: Over-molding for non-slip grips · Complex knurling via casting · Concentricity by CNC machining.
Core Manufacturing Advantages
From precision casting to final delivery — hard capabilities backed by full process control.
Micron-Level Precision
Investment casting to ISO DCTG4-6 + 5-axis CNC finishing delivers ±0.01mm repeatability. Casts ribs, contours, and lightening holes in one piece — no welding.
- Complex cavities
- Near-net shape
- High yield
200+ Machine Tools
Two facilities with milling, turning, and 5‑axis centers. Secondary ops on threads, bores, and mating surfaces ensure precise fits — no play, rattling, or premature wear.
- Precision threading
- Sealing surfaces
- Complex contours
Full Process Control
Wax → shell → pour → heat treat → machine → finish all in‑house. Cast surfaces at Ra 3.2‑6.3 + electropolishing or powder coating — far superior to die casting.
- 80+ tons / month
- Automatic Shell Drying Line
- SPC monitoring
Technical Specifications & Quality System
ISO 9001 certified facility with automated shell drying and imported inspection equipment for batch‑to‑batch consistency.
- Investment Casting Capability
Casting Tolerance: VDG P690 D1-D2 / ISO8062 DCTG4-6
Surface Roughness: Ra 3.2 – 6.3
Part Weight Range: 0.01kg – 85kg
Max Envelope Dimension: 600mm
Annual Capacity: 1,000 tons
- Quality & Inspection
- Full GD&T verification
- Spectro analysis
- Micro-feature inspection
- Flatness & parallelism check
Key Industries We Serve
Our connectors and fittings are widely used in the following industrial sectors, providing reliable solutions for critical connections.
How We Enhance Component & System Performance
In addition to our core manufacturing capabilities, we offer the following specialized services to help you optimize the design and production of connectors and fittings.
Ergonomic Design
Shapes and textures engineered to reduce operator fatigue.
Function Integration
Locking, indicating, and connecting in one component — simplifying assembly.
Lightweight & Strong
Topology‑optimized casting reduces weight without sacrificing strength.
Weather & Chemical Resistant
Alloys and coatings for corrosive, high‑temp, or outdoor use.
Brand Mark Casting
Logos and part numbers cast directly — permanent and surface‑friendly.
Connectors and Fittings We Have Manufactured
Examples of typical exhaust components with process, material, and part details.
Factory & Manufacturing Facilities
Foundry & Machining: Investment casting facility with automated shell drying line · 2 machining plants
Inspection Equipment: CMM · Optical comparator · Material tester · Height gauge · Thread gauge set
Quality Documentation: Material test reports · Dimensional inspection reports · FAI (First Article Inspection) · PPAP (upon request)
How to Order Custom Handles & Knobs
Dedicated program management from inquiry to production — transparent, efficient, and fully traceable.
Client Testimonials
What engineers and procurement leaders say about our powertrain parts
“Allied Metal delivered ergonomic handles for our surgical consoles with exceptional finish and consistency. Assembly yield improved 12% immediately.”
Senior Supply Chain Manager Stryker Corporation
“The casting-plus-machining approach shortened development by 4 weeks. Their 5‑axis capability produced complex lever geometries in a single setup.”
Director of Operations Atlas Copco Industrial
FAQs
What is the minimum order quantity for investment casting?
We recommend a minimum of 500 castings to optimize mold costs, but offer rapid prototyping from as low as 50 pieces for testing.
Can you provide both heat treatment and machining?
Yes. We offer a complete one-stop service—casting, heat treatment, machining, and surface treatment—all managed in-house.
Can you guarantee very tight tolerance requirements?
Our precision casting achieves ISO DCTG4-6 grades, and with CNC finishing we can meet tolerances as tight as ±0.01 mm.
Do you offer electropolishing?
Yes, it is one of our standard surface treatments, especially suited for stainless steel handles to improve corrosion resistance and gloss.
Start Your Custom Handle Project
Investment casting + 200+ machine tools — full‑chain support from concept to finished parts
B2B engineering partnerships · Low‑volume flexible start · Seamless transition from prototyping to production