Surface Square Helios Preisser flat machinist try square 400 x 230 mm model 0375416

Helios Preisser flat machinist try square 400 x 230 mm model 0375416 is a precision layout and inspection tool for achieving and checking 90° angles in metalworking and woodworking. The try square combines a flat blade and a rigid stock to provide a stable reference for marking, verifying squareness of edges and assemblies, and setting up machines or fixtures in workshops and production environments. Its dimensions make it suitable for medium- to large-scale parts and assemblies where a straight, accurate right angle is required.

Advantages

The tool offers a rigid construction that maintains a consistent reference edge during repeated use and helps reduce measurement error when marking or checking components. Its flat blade provides a broad contact area for reliable alignment against workpieces, while the overall geometry is designed to resist bending and torsional stress. The try square's size balances reach and control, enabling precise positioning on larger components without sacrificing maneuverability.

Suitable for

• Marking and scribing right angles on metal plates and wooden boards
• Checking squareness of machined parts, assemblies and welded frames
• Setting up machine fences, jigs and fixtures
• Quality control inspection in workshops and production lines

Key specifications

• Blade length: 400 mm
• Stock width/depth: 230 mm
• Material: precision-ground metal construction for stable reference surfaces
• Design: flat blade with rigid stock for accurate 90° alignment

How to use

Place the stock firmly against the reference surface of the workpiece and ensure full contact along the length of the blade. Use the flat blade edge to mark or scribe a line at 90° to the reference face, or hold the tool in place while inspecting the angle between two surfaces. For verification tasks, view the contact along the blade to detect any gaps or misalignment; use feeler gauges or a precision straightedge if finer measurement is required. When using the try square on finished surfaces, handle it carefully to avoid scratching or damaging the workpiece.

Usage recommendations

Keep reference surfaces clean and free of chips or debris before use. Store the try square in a protective sleeve or drawer to preserve the ground faces and avoid impacts that could alter squareness. Periodically check accuracy against a calibrated reference or a precision inspection square, especially after heavy use or accidental drops.