Cast Iron Straight Edges are widely used for setting up and leveling machinery and equipment, for checking the flatness of surfaces or scribing. Also can be used for positioning work above and parallel to a surface.
Features of Cast Iron Straight Edge:
• Made from high quality cast iron.
• I-Section or Parallel type.
• Casting stress – relieved to remove internal stresses.
• Offered in hand-scrapped finish to various Grades.
• Top and bottom faces are precision ground parallel and flat.
• Offered in three Grades of accuracies: Grades 1, 2 and 3.
• Supplied with fine storing case for protection and storage.
These features make Hanxin one of the best Cast Iron Straight Edge manufacturers in the industry.
We are a leading manufacturer of cast iron straight edges, widely used for assembly, commissioning, and leveling applications.
We supply factory inspection reports and calibration certificates upon request, ensuring traceability and conformity with international surface plate accessory standards.
Our I-section straight edges are designed to verify the flatness of large precision surfaces, such as machine tables and surface plates. They are also commonly used for blue matching during manual scraping operations. The I-section design provides a wide, parallel working surface, making it ideal for accurate spirit level measurements.
· Constructed from stress-relieved cast iron to ensure maximum stability.
· Cored and ribbed design enhances rigidity while minimizing overall weight.
· Top and bottom surfaces are precision-ground, remaining flat and parallel within 0.0005" over 12".
· Ideal for setting up and leveling machinery, inspecting surface flatness, or scribing.
· Can also serve to accurately position workpieces parallel to a reference surface.
Specification: see attached form or customize
Surface treatment: hand-scraped, ground finish, milling finish
Surface coating: working surface covered with pickling oil and non-working surface covered with antirust paint
Precision grade :1-3
Packaging: plywood box / fine storing case
Warranty: 1 year
OEM or ODM service: we offer a wide range of services from standard Cast Iron Square Rulers to custom order as per request.
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.
| Size(mm) | Flatness | Parallelism | ||||
| Precision Degree(μm) | ||||||
| GR “1” | GR “2” | GR “3” | GR “1” | GR “2” | GR “3” | |
| 500×100x60 | 6 | 12 | 9 | 18 | ||
| 750×100x60 | 8 | 15 | 12 | 25 | ||
| 1000×100x60 | 10 | 20 | 15 | 30 | ||
| 1200×100x60 | 12 | 24 | 18 | 36 | ||
| 1500×100x60 | 15 | 30 | 20 | 40 | ||
| 2000×150x80 | 20 | 40 | 80 | 27 | 54 | |
| 2500×150x80 | 25 | 50 | 100 | 33 | 65 | 130 |
| 3000×180x100 | 60 | 120 | 78 | 156 | ||
| 3500×180x120 | 70 | 140 | 90 | 180 | ||
| 4000×180x120 | 80 | 160 | 100 | 200 | ||
*Other sizes and types can be manufactured as per requirement.
The Cast Iron Straight Edge is widely used in:
✔ Machine tool setup and alignment
✔ Surface flatness and run‑out checking
✔ Inspection and quality control departments
✔ Layout and marking operations in workshops
✔ Fabrication and assembly jig setup
Applicable in industries such as:
✔ Automotive manufacturing
✔ Heavy machinery & equipment assembly
✔ Aerospace parts production
✔ Metal fabrication shops
Ready to order or need a custom size?
Contact us now for a competitive quote and detailed specification sheet.
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