Description
Product Overview
The RSK 740B Mini Precision Level is a highly specialised, ultra-compact spirit level designed specifically for use in exceptionally tight or narrow spaces where a standard machinist level simply will not fit.
- Miniature Footprint: Measuring just 100mm long (approx. 4 inches) and weighing a mere 0.15kg, it is the smallest size available in RSK’s precision class. This makes it ideal for leveling delicate, non-load-bearing equipment (such as semiconductor manufacturing machines) that cannot support the heavy cast-iron weight of a full-sized master level.
- High Precision: Despite its miniature size, the 740B series maintains elite metrology standards, capable of measuring the straightness, flatness, and parallelism of machine tool guide rails and surface plates.
- Adjustment Mechanism: It features a highly reliable double eccentric adjustment structure, allowing you to easily recalibrate and zero the main bubble vial when necessary to maintain its high accuracy.
Condition
Used.
This RSK mini level is in used condition. (Note: Please verify the specific sensitivity printed on the glass vial for your listing—the 740B model was manufactured in 0.02mm/m, 0.05mm/m, and 0.1mm/m sensitivities). As with any used precision instrument, it is highly recommended to check its zero-point calibration on a known flat surface plate before undertaking critical leveling tasks.
Brand Information
RSK (Niigata Riken Sokuhan) is a premier Japanese manufacturer specializing in precision measuring instruments. RSK is considered a global benchmark for precision spirit levels and straight edges. Their tools are the standard choice for professional machine tool builders, calibration labs, and high-end metrologists in Asia and around the world.
Specifications
| Feature | Specification |
| Brand | RSK (Niigata Riken Sokuhan) |
| Model | 740B |
| Type | Mini Precision Bar Level |
| Length | 100mm (approx. 4″) |
| Dimensions (W x H) | 18mm x 20mm |
| Weight | 0.15kg |
| Origin | Made in Japan |
Keywords
RSK 740B, mini precision level, 100mm machinist level, small bar level, machine setup level, semiconductor machine level, pocket precision level, Japanese metrology.




