Starrett Machinists Level with Ground Main Vial, 6-Inch | Cross Test Vial - Model 98-6

Overview

The Starrett Machinists Level 98-6 is a 6-inch precision leveling instrument designed for machine shops and tool rooms. It features a ground main vial paired with a cross test vial, enabling level readings in two directions. This configuration helps keep setups aligned across flat and round work. The unit ships without a case, making it easy to integrate into existing tool kits.

Key features at a glance

• Adjustable vials: quick, positive setting controlled by a knurled side knob for fast leveling tasks.
• Durable base: cast iron surface precision-machined on the reference plane to maintain stability over time.
• Protective housing: satin finished brass tube with a friction-fit closing cover to resist impact and wear.
• Cross test vial: enables simultaneous level checks in two directions to reduce canting errors on round work.
• Ergonomic seating: involute groove between bearing flats improves seating on round objects and accommodates larger rounds.
• Heritage and quality: proudly made in the USA, combining long-standing craftsmanship with globally sourced materials.

Real-world applications and benefits

• Fast setup checks during machine setup, jig alignment, and fixture leveling.
• Reliable alignment of shafts, spindles, or round stock by verifying level across multiple directions.
• Stable reference for repetitive tasks where consistent leveling improves workflow and accuracy.

What to expect in use

Users can pursue precise readings by using the dual-vial system and the knurled adjustment to fine-tune the level. The protective brass tube helps shield the vial in busy shop environments, while the involute seating groove supports stable contact on round components. While results depend on setup and technique, this level is designed to support careful, repeatable measurements in demanding workloads.