Investment Casting Door Knob

Upgrade every entryway with our Investment Casting Door Knob, engineered in China, to deliver high strength and designer-level detail. By combining world-class investment casting with 5-axis CNC machining, we create knobs that look exceptional and last decades—even in coastal, commercial or high-traffic environments.

Investment Casting Door Knob

Why Choose Our Investment Casting Door Knob

1. Marine-Grade 304/316 Stainless Steel

Full 8 % nickel and 18 % chromium content stops rust before it starts, outperforming plated brass or zinc alloys.

2. Lost-Wax Precision

Every knob is cast to ±0.15 mm accuracy, eliminating secondary machining on decorative curves and reducing cost.

3. Mirror or Satin Finish

Electropolishing, gold or bronze delivers scratch-proof color that never flakes.

4. Silent, Smooth Operation

CNC-machined spindle and spring-loaded mechanism guarantee 200,000+ cycles without wobble or squeak.

5. One-Stop Supply Chain

From raw melt to final QC, all steps are performed in our ISO 9001 foundry and machine shop, cutting lead times to 15–20 days.

Technical Specifications

Materials: CF8 (304), CF8M (316), duplex 2205 on request
Sizes: 54 mm rose, 65 mm knob, 70 mm backset (customizable)
Finish: Ra 0.2 µm mirror, satin 320 grit, PVD colors
Standards: ANSI/BHMA A156.2 Grade 2, EN 1906
Salt-spray test: 1,000 hrs neutral salt fog, zero red rust
Packaging: individual bubble bag + carton + pallet, drop-tested for e-commerce

Why Choose Us?

Over 15 years of expertise in investment casting and machining
State-of-the-art manufacturing facility in Ningbo, China
Strict quality control from material selection to final inspection
Trusted by clients worldwide for premium door hardware solutions

Customization & OEM Support

Need a unique profile, logo engraving or special spindle length? Send us a drawing, sample or even a hand sketch. Our bilingual engineers turn concepts into 3D-printed wax patterns within 48 hours and deliver first article knobs in 7 days. From low-volume boutique orders to 50,000-piece hotel chains, we scale production without sacrificing precision.

Ordering & Samples

MOQ is 200 sets per finish; existing samples ship in 3 days free of charge. Contact us today for instant DFM feedback and a 24-hour quotation on your next Investment Casting Door Knob project.

FAQ

Q1:	Can I request a sample before bulk order?
A1:	Yes, we provide samples for quality validation.
Q2:	What payment terms do you accept?
A2:	We accept T/T, L/C, and PayPal for smaller orders.
Q3:	Do you offer custom designs?
A3:	Yes, we support custom designs, sizes, and finishes.