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Custom Precision Granite Components with Pre-Embedded Threaded Inserts
Custom Precision Granite Components with Pre-Embedded Threaded Inserts
We fabricate bespoke precision granite components, including precision granite surface plates, high-precision granite machine bases, granite inspection gauges and CMM granite beds for global precision manufacturing sectors. To simplify on-site mechanical assembly for your equipment, we offer factory pre-installation of threaded inserts directly into granite workpieces during production.
Made from premium natural black granite, our granite machine bases and granite measuring components deliver ultra-low thermal expansion, outstanding structural stability, excellent corrosion resistance and non-magnetic performance. Embedded threaded inserts are an optional built-in feature integrated into granite substrates. These metal inserts create robust threaded anchor points for mounting linear guides, coordinate measuring instruments, drive units and other mechanical assemblies, without compromising the flatness, rigidity and inherent precision of the granite body.
We commonly fit 304 stainless steel inserts within precision granite surface plates, granite machine bases and custom granite mechanical components. Our granite parts with embedded inserts are widely adopted on granite inspection platforms, CMM granite bases and granite metrology gauges, serving precision metrology, semiconductor manufacturing, laser processing and factory automation industries worldwide.
Thread Inserts Specification Table
| Detail info of the Threaded Insert | |||||
| Screw thread | External diameter | Insert length | Thread length | Torsion | Remark |
| M | Ø | L | H | NM | Custom inserts according to drawing! |
| 3 | 8 | 25 | 10 | 2 | |
| 4 | 10 | 30 | 12 | 4 | |
| 5 | 10 | 35 | 15 | 8 | |
| 6 | 12 | 35 | 18 | 10 | |
| 8 | 15 | 40 | 25 | 30 | |
| 10 | 20 | 40 | 30 | 55 | |
| 12 | 22 | 45 | 35 | 95 | |
| 16 | 30 | 50 | 50 | 220 | |
| 20 | 35 | 60 | 60 | 280 | |
| 24 | 40 | 70 | 70 | 450 | |
| 30 | 48 | 80 | 80 | 550 | |
Our standard 304 stainless steel threaded inserts are finished with epoxy resin coating. When embedded into precision granite surface plates and high-precision granite machine bases, the epoxy coating forms a strong bonding layer between metal insert and granite substrate. Every batch of embedded fittings undergoes pull-out load testing to guarantee consistent load-bearing capacity and long-term connection reliability. This design effectively prevents loosening under cyclic assembly and heavy working loads.
Beyond the standard insert dimensions listed above, we provide full custom embedded machining services for granite components. All granite workpieces, together with embedded insert dimensions, step profiles and machining tolerances, can be fully manufactured to match your engineering drawings and unique project specifications.

We provide two flexible working options to meet different project requirements:
Supply finished precision granite components, including granite machine bases, granite surface plates and granite measuring gauges with threaded inserts pre-fitted in our workshop before shipment.
Precision embedding processing service: Our skilled technical team can install inserts supplied by customers onto your existing granite surface plates, granite machine bases and custom granite mechanical components.
Whether you are designing brand-new high-precision granite machine bases or upgrading existing precision granite surface plates for your production line, our integrated insert embedding machining service cuts down your on-site assembly work while fully retaining the original flatness, structural rigidity and long-term stability of your granite workpiece.
RAQ (Regularly Asked Questions)
Q1: What types of granite products can be fitted with embedded threaded inserts?
A: We can pre-install threaded inserts on precision granite surface plates, high-precision granite machine bases, CMM granite beds, granite inspection gauges and all custom granite mechanical components, according to your drawing requirements.
Q2: What materials are available for the embedded threaded inserts?
A: 304 stainless steel inserts are our regular options. Special insert materials can also be customized to match your application environment.
Q3: Will embedding inserts damage the flatness and precision of granite components?
A: No. Our embedding process is carried out before final lapping. We strictly control machining tolerance to preserve the original flatness, stability and accuracy of the granite substrate.
Q4: Can I provide my own inserts, and you only complete the embedding work?
A: Yes. We offer standalone insert embedding service. You supply the inserts, and our technicians perform precision installation on your granite surface plates or granite machine bases.
Q5: What information do I need to provide to get a quotation?
A: Please share your engineering drawings, target precision grade, insert specifications, quantity and application industry. Our team will review and reply with a formal quote quickly.
Feel free to send over your technical drawings and project specifications today. Request your custom quotation for precision granite components with pre-embedded threaded inserts.
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