Goniometer Tajima SLT100MY with magnetic base, angle measuring tool, aluminum

The Tajima SLT100MY goniometer with magnetic base is an aluminum angle measuring tool designed for precise positioning and repeatable angle transfer on ferrous surfaces. Its magnetic base holds the tool securely to steel and other magnetic materials, allowing hands-free measurement and alignment. The lightweight aluminum construction reduces weight while maintaining rigidity for routine metalworking, welding setup, fabrication and on-site layout tasks.

Advantages

The built-in magnet provides stable attachment to ferrous workpieces so you can measure or transfer angles without additional clamps. The aluminum body is corrosion-resistant and light enough for portable use while remaining sufficiently rigid for accurate readings. The goniometer’s design enables quick alignment and angle replication, improving workflow efficiency when setting up jigs, fixtures or welds.

Suitable for

• Metalworking and sheet metal layout where angles must be transferred or checked
• Welding setup and fabrication for verifying and duplicating joint angles
• Machinery maintenance and assembly tasks on ferrous components
• On-site construction layout when working with steel structures

When it may not be suitable

This goniometer relies on a magnetic base and is intended for use on ferrous materials; it will not hold to non-magnetic surfaces such as aluminum or stainless steel with low magnetic permeability. For precision metrology requiring traceable calibration to laboratory standards or sub-minute angular resolution, a high-precision digital inclinometer or calibrated angle gauge may be more appropriate.

Key specifications

• Material: aluminum body for low weight and corrosion resistance
• Base type: integrated magnetic base for attachment to ferrous surfaces
• Function: manual angle measurement and transfer (goniometer)
• Intended applications: metalworking, welding, fabrication, maintenance, layout
• Portability: compact and lightweight for handheld and on-site use

How to use

Place the magnetic base against a clean, flat ferrous surface and allow the magnet to engage fully to secure the goniometer. Align the tool’s angle faces to the reference edge or feature you are measuring or transferring. Read the angle from the instrument’s scale or use it as a template to mark the workpiece. For optimal contact and stability, clean mating surfaces of rust, paint or debris before use.

What to consider before purchase

• Intended workpiece material — effective only on ferrous/magnetic surfaces
• Required measurement precision — this is a practical workshop tool rather than a laboratory-calibrated instrument
• Need for portability and lightweight construction versus absolute rigidity

Usage recommendations

Use the Tajima SLT100MY on clean magnetic surfaces and combine with simple fixtures or clamping if extra stability is needed. Store in a dry place to preserve the aluminum finish and keep the magnetic base free of metal filings. For difficult-to-hold parts, pair the goniometer with temporary magnetic clamps to improve repeatability during layout and welding setup.