A sliding limit block that can be attached to your existing steel ruler. Incorporates an easy to use thumb cam lock with positive snap shut to ensure the ruler does not slip once held. Allows you mark-out / scribe dimensions simply & repeatably. The wide face of the block helps to keep square up against the object.
To avoid too many variations, this listing is intended to capture the most common sizes for SMALL steel rulers, usually around 100-200mm (4-8") long. Most of which fall in the range of 15-20mm wide. For other ruler widths click on the below links to listings:
Simply measure your rulers width and thickness and pick the Print Profile with the nearest dimensions in its title.
Tip: this is made super easy if you are measuring with digital calipers, and just round down/up any decimal places……examples below;
To assist with selection I have uploaded an Excel file in the Documentation (bill of materials section). It is titled ‘Limit Block Size Checker’ and will do all the math to let you know the best profile to chose…..or let you know if there isn't currently a suitable profile available.
Fasteners: For these limit block sizes you will need 2x M3 fixings which act purely as strong pivot axles to the cam lever. Optimally these would be 16mm long for the 20mm wide ruler block, and 12mm wide for the 15mm ruler block…..but you could also use any M3 fixing downwards of these values to as low as approx. 8mm long.
Assembly:
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