Don't you need to find a true level item to calibrate this level?

It is possible to level a "level" by flipping it 180 degrees (end-for-end) and setting it up to read exactly the same number of divisions off of ideal. Alternately, one can set up a local "true level" by shimming a surface until it reads the same with the level flipped 180 degrees... In any case "level" can be established as derived standard.

Is this a 0005" per 10" master level?

No that is a 4 inch 98 level good to .005 if an inch.

how do you calibrate this

Find a pretty level surface set 98 on mark with sharpee the edges.. on one end of level are hex nuts above and below that is your ajustment point with level on surface and marked with sharpee look at bubble now turn level 180 degree make sure to put the level back into the marked area look at bubble now a just ..

are the screw and stud supposed to be centered on the post? The one I received had the holes off center.

The upper part is an unmachined casting, but I am sure that Starret makes sure that the holes are drilled centered to the prizm below. It is not relevent that the hole is not centered in the post. Just my two cents.

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Starrett Machinists' Level, Ground and Graduated Main Vial, 4" Length

Starrett Machinists' Level, Ground and Graduated Main Vial, 4" Length

Product ID: 19624064

Details

Brand
Starrett
Color
Silver
Material
Cast Iron
Product Dimensions
4"L x 1.5"W
Style
Without Case

🎯Involute groove for perfect centering

🔧Adjustable vial with knurled knob

⚙️Precision-machined cast iron base

€ 287.65

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Description

🎯 Level up your craft with precision that professionals swear by!

PINPOINT ACCURACY EVERY TIME - Adjustable main vial ensures flawless leveling for critical machine setups.
BUILT TO LAST BUILT FOR PROS - Durable cast iron base with precision ground surfaces resists wear and tear in demanding environments.
TRUSTED HERITAGE MADE IN USA - Over 140 years of Starrett innovation delivers unmatched quality and reliability.
COMPACT LIGHTWEIGHT POWERHOUSE - 4-inch length and just 6.4 ounces—portable precision that fits your workflow.
ERGONOMIC DESIGN FOR PERFECT SEATING - Special involute groove guarantees stable, centered placement on round workpieces.

The Starrett Machinists' Level 98-4 is a 4-inch precision tool featuring an adjustable main vial housed in a satin brass tube, mounted on a durable, ground cast iron base with an ergonomic involute groove for accurate seating on round surfaces. Designed for machine shop and tool room use, it offers superior accuracy and durability, backed by over 140 years of American craftsmanship.

Specifications

ASIN	B0002FUO6S
Best Sellers Rank	#46,524 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #76 in Levels
Brand	Starrett
Brand Name	Starrett
Color	Silver
Customer Reviews	4.6 out of 5 stars 839 Reviews
Global Trade Identification Number	00049659504408
Included Components	Unit^Instruction Guide
Item Dimensions L x W	4"L x 1.5"W
Item Highlight	for Machine Shop and Tool Room Use, Without Case and Cross Test Vial, 98-4
Item Type Name	bubble
Item Weight	6.4 ounces
Manufacturer	Starrett
Manufacturer Part Number	98-4
Manufacturer Warranty Description	One Year on defects in material and workmanship
Material	Cast Iron
Material Type	Cast Iron
Model Number	98-4
Number of Items	1
Operation Mode	Manual
Product Dimensions	4"L x 1.5"W
Style	Without Case
Style Name	Without Case
UPC	049659504408 049659623451

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€ 287.65

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Very impressed with the quality and fast delivery. Will shop here again.

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