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98 MACHINISTS' LEVELS WITH GROUND AND GRADUATED VIALS
These levels have ground and graduated main vials. All sizes have a cross test vial except the 4" (100mm) model.
The 12" (300mm) model also has a plumb vial and the 18" (450mm) size has a double plumb vial.
These vials are adjustable to a positive setting and are housed in a satin chrome finished brass tube with a friction-fit closing cover to prevent breakage.
The base of the levels features an involute groove running the length of the base, which provides a reliable seat for round work such as pipes or shafting.
With the cross test vial, it is possible to simultaneously level in both directions. This prevents inaccuracies in the main vial reading caused by canting the level sidewise on round work.
The 6" through 18" (150-450mm) main level vials have graduations that are approximately 80-90 seconds or .005" per foot (0.42mm per meter). There are five, six, or seven lines on each side of the bubble, depending on the base length.
End view showing involute groove
98 Machinists' Levels with Ground and Graduated Vials Size
Inch mm 4
100 150 200
300 450 Description
Without Cross Test Vial With Cross Test Vial
With Single Plumb Vial and Cross Test Vial
With Single Plumb Vial and Cross Test Vial Standard Letter of Certification*
With Double Plumb Vial and Cross Test Vial
Tube and Plug Assemblies
Without Case Cat. No. 98-4 98-6
98-8 98-12 EDP
With Cross Test Vial, Standard Letter of Certification* 98-6 W/SLC 66935 With Cross Test Vial
98-12 W/SLC 66934 98-18
To guarantee extreme accuracy, the length of your level should not be longer than the work you are leveling. * Includes redemption card for Standard Letter of Certification (SLC)
98Z-12 W/SLC 66933 98Z-18
50446 PT99432 64499
In Finished Wood Case Cat. No.
EDP Part No. EDP
PT99430 64497 PT99431 64498
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