u/Own-Medicine1612

[deleted]

Please help me out !

Hi everyone,
I have been working in the B2B manufacturing industry for several years, mainly producing custom mineral castings / epoxy granite machine bases for industrial automation and CNC applications.
Most of our work is currently custom OEM production, but I am considering developing a few standardized CNC machine frames/bases for the US DIY and small-machine-builder market.
Instead of starting with a complete CNC machine, the idea would be to sell the mineral cast machine frame/base only, so customers can install their own linear rails, ballscrews, spindle, motors, etc.
Something along these lines:
Mineral cast / epoxy granite construction
High vibration damping
High stiffness
Cast-in steel or aluminum inserts
Machined mounting surfaces
Designed for HGR15/HGR20 linear rails
Ballscrew mounting provisions
STEP/CAD files available
Optional precision machining
I’m trying to understand what size would actually be attractive to DIY CNC builders.
Which of these would interest you most?
A: 400 × 400 mm — ~30–50 kg
B: 500 × 500 mm — ~50–80 kg
C: 600 × 500 mm — ~80–120 kg
D: 700 × 600 mm — ~120–200 kg
And what would you consider a reasonable price for the mineral cast frame/base only, without electronics, spindle, motors or linear rails?
For example:
$500–700
$700–1,000
$1,000–1,500
$1,500–2,500
I’m particularly interested in hearing from people who are currently building a DIY CNC mill/router or considering a new machine.
What would make you choose a mineral cast frame over a welded steel frame or cast iron?
Thanks! I’m genuinely trying to understand the market before investing in tooling and inventory.

Would you prefer to buy:
Raw mineral cast frame
Mineral cast frame with machined mounting surfaces
Fully machined frame with steel inserts and rail mounting surfaces
Complete mechanical kit including rails, ballscrews and mounts

How much does it cost?

I’m currently customizing a high-precision CNC machine for a customer.
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Also, which brands of linear guideways do you think offer the best value for money? I’m interested in hearing your experiences with brands such as THK, Hiwin, PMI, Bosch Rexroth, NSK, IKO, Schneeberger, or others.

These anchor inserts are cast into the mineral casting. Do you believe they offer adequate pull-out resistance? Is there any concern that they could become loose or be pulled out under load? Have you come across any alternative anchor designs for mineral castings? Thanks

Regardless of the country, are you aware of any CNC machine manufacturers or automation equipment builders that use mineral castings (epoxy granite) for their machine bases or structural components? I’d appreciate any recommendations or examples.

I’ve been noticing a growing trend of DIY machine builders using mineral casting for their projects. Some are building machine bases, while others are casting gantries and crossbeams. Is mineral casting becoming a new trend in machine construction? What makes it better than traditional materials like cast iron, steel, or granite? I’d love to hear your experiences and opinions.Thx

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