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Cast Iron Square Hollow Block

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Cast Iron Square Hollow Blocks are made of high tensile cast iron properly seasoned against distortion. They are wildly used in machine shop for set up in machine operations, also used as height blocks for scribing and inspection, or for building up the height of components on machine tables. The flatness and perpendicularity between table face and top face with vertical working surface as per request. Our box angle plates meet or exceed the requirements set forth by various National and International Standards.

OEM or ODM service: we offer a wide range of services from standard Cast Iron Square Boxes/Blocks to customized and specifically designed as per loading requirement.

Calibration Certificate: EX-works inspection reports offered by our Quality Inspection Department are included with every surface plate, “Calibration Certificate” is available upon request for an additional charge.

Delivery Costs: calculated during the checkout process.

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Specification:

Cast Iron Square Hollow Blocks / Square Box Blocks — Precision, Strength, and Lightweight Handling

The cast iron square block is primarily used for testing, marking, and verifying the parallelism and perpendicularity of various parts. It is a solid cube with six working surfaces, typically made of cast iron or steel, with one face featuring a V-slot for versatile applications. Its hollow construction helps reduce weight while maintaining rigidity, making it easier to handle during repeated positioning and fixture work.

Key Uses:

· Layouts and machine setups
· Tooling and inspection
· Measurement and scribing
· Equipment installation
· Industrial engineering and construction

This inspection square hollow block is a multi-functional tool, providing precision and reliability in both workshop and industrial environments. Its durable cast iron or steel construction ensures long-term stability and accuracy.

Item	Specification
Product Name	Industrial Cast Iron Square Hollow Block
Material	HT200-300 Cast Iron
Specification	Customized Sizes Available
Surface Options	Flat Surface / Tapped Holes / T-Slots / Cored Elongated Slots
Working Surface Hardness	HB160-240
Surface Treatment	Hand-Scraped or Finish-Milling
Surface Coating	Pickling Oil + Plastic Lined Protection or Anticorrosion Paint
Heat Treatment	Available for Stress Relief, Dimensional Stability, and Wear Resistance
Precision Grade	Grade 2-3
Packaging	Anti-Rust Packing + Strong Plywood Box
Warranty	1 Year
Custom Service	OEM / ODM Supported
Application	Welding, Fixturing, Assembly, Inspection, Fabrication Workshops

Features of Cast Iron Square Hollow Block:

• Made from high quality cast iron.

• Heat-treated for stress relief.

• Offered in two grades of accuracies – Grades: 2 & 3.

• Machined T-slots and cored elongated slots provided to facilitate clamping.

• Special sizes as per customer's specific requirement also offered.

• Offered as matched pair.

These features make HANXIN one of the best Cast Iron Square Hollow Block manufacturers in the industry.

Quality & customization

We offer strict quality control and finishing options (machining, scraping, chamfering) plus OEM/ODM services to match specific load, tolerance or fixturing requirements. Custom internal reinforcement, mounting holes or protective coatings can also be supplied for special applications.

*Custom - Designed specifically for your application. Some options include T-slots, custom hole sizes, custom patterns. Contact us for more information.

Benefits for your shop

· Faster, safer handling on the shop floor thanks to the lighter hollow form — ideal for repetitive set-ups.
· Consistent squareness and stable reference faces reduce rework and improve assembly accuracy.
· Versatile: use as support/fixture blocks, for parallelism/verticality checks, as datum blocks during assembly, or as a precision base for part marking.

Applications

This cast iron square hollow block is suitable for machine tool setup, precision marking, component height adjustment, inspection work, and assembly reference positioning. It is an ideal support block for workshops that need reliable squareness, stable reference faces, and repeatable positioning accuracy.

FAQ

Q1: What is a Cast Iron Square Hollow Block used for?
It is mainly used for machine setup, inspection, scribing, height adjustment, and checking perpendicularity and parallelism in workshop applications.

Q2: Can the size and structure be customized?
Yes. We can customize dimensions, surface type, T-slots, tapped holes, cored slots, and coating according to your technical requirements.

Q3: What accuracy grades are available?
Precision grade 2-3 is available, and the final specification can be adjusted according to your application and tolerance requirements.

Q4: How is the product packed for export?
Each product is packed with anti-rust protection and delivered in a plywood box for safer international shipping.