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Starrett

Starrett Machinists' Level, Ground Main and Cross Test Vial, 6" Length

  • Based on 839 reviews
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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Oct 3
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Size: 6"


Style: Without Case


Features

  • Adjustable - The vials are adjustable to a positive setting. It can be adjusted by turning the knurled knob on the side of the level, making it easy for quick leveling tasks.
  • Durable Fine Finish - The base is made from cast iron and is precision-machined on the reference surface to increase durability. The vial is housed in a satin finished brass tube with a friction-fit closing cover to prevent breakage.
  • Accurate and Precise - 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.
  • Ergonomic - The base of the levels features an involute groove between the bearing flats for accurate seating on round work. This groove has a special involute design, permitting better centering and greater capacity to handle larger rounds.
  • The Standard for Excellence - Proudly made in the USA, Starrett combines over 140 years of American heritage and innovation with globally sourced materials to deliver exceptional quality tools and products.

Description

Crafted from cast iron and precision-machined on the reference surface, the base delivers lasting durability. An involute groove runs the length of the base, providing a reliable seat for round work and ensuring stability in demanding applications. Main level vials feature precise graduations for reliable readings, complemented by a cross vial to reduce errors during use. Each vial is adjustable to a positive setting and housed in a satin-finished brass tube with a friction-fit closing cover, enhancing both accuracy and durability. Engineered for precision in machine shop and toolroom environments, the Starrett 98 Machinists Level delivers dependable accuracy in a compact form factor. Starrett offers a wide range of levels for both jobsite and workshop use. This section highlights our precision-machined metal levels—crafted for machinists, toolmakers, and professionals who demand uncompromising accuracy. Explore our lineup of ground and graduated vial levels, precision bench levels with double plumbs up to 24", cross-test levels, and more. Machinists' Level - 98-6 Machinists' Level - 98-8 Machinists' Level - 98-12 Machinists' Level - 98-4 Machinists' Level- 98Z-12

Brand: Starrett


Material: Cast Iron


Color: Black


Product Dimensions: 6"L x 1.19"W


Style: Without Case


Brand Name: Starrett


UPC: 049659623468 049659504415


Number of Packs: 1


Global Trade Identification Number: 15


Manufacturer: Starrett


Manufacturer Warranty Description: One Year on defects in material and workmanship


Number of Items: 1


Included Components: Product & Instructions Guide


Item Type Name: bubble


Model Number: 98-6


Manufacturer Part Number: 98-6


Color: Black


Style Name: Without Case


Item Dimensions L x W: 6"L x 1.19"W


Item Weight: 0.6 kg


Level Measurement Units: millimeter, meter, inch


Material Type: Cast Iron


Item Highlight: Designed for Machine Shop and Tool Room Applications, Without Case, 98-6


Operation Mode: Manual


Level Measurement Type: bubble


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Amazing precision!
Size: 12" Style: Without Case
If you thought a good hardware store level was precise, think again. I needed this to level out the platen on my wide format printer, we’re talking about fractions of a mm tolerance that were causing the print carriage to rub. After using steel thickness gauges to level everything out, we were still getting a slight bit of blur across the travel. Bring in a $300 level I never knew I needed. First, you have to calibrate this yourself. Look up some videos and find a VERY stable table or just go straight to the concrete like I did, just make sure the floor is clean and there is no lose debris. Place some tape marks and take your time alternating directions. Once calibrated, you’ll be able to capture the slightest inaccuracies. 0.0002” per foot tolerance is no joke. We were able to plum up the platen in no time and fix the detail issue with the printer. Life saver! Would have never been able to achieve the same results using an ordinary level, not even close. It’s expensive for what it is, but everything about it is precision machined and the glass vial is insanely sensitive. The 12” version I purchased actually comes with 3 total levels. I knew it had an extra one on the front for a second axis, but it also has another for a 3rd axis located in the middle where the finger holes are. At this price and sensitivity, I wish it came with a case. It’s pretty robust and the main vial has a cover, but I’d like to give it some extra protection anyway. ... show more
Reviewed in the United States on October 15, 2024 by Chris B.
    • Easy to calibrate!!!
Size: 6" Style: Without Case
Awesome level. Calibration is very easy when compared to the cheaper levels. 5-10 minutes and it was dead on.
Reviewed in the United States on April 2, 2026 by TimGS
    • Very accurate
Size: 8" Style: Without Case
There are several great machinist tool manufacturers around, Starrett is one. This is a very accurate level.
Reviewed in the United States on June 3, 2026 by Walter Agotsch
    • Most needed if you're in the business of billiard and leveling of pool table
Size: 12" Style: Without Case
Best equipment I have purchase since i been in the business of billiards, now my leveling of pool table is at 95-100% accuracy, I would recommend even to have one if youre in the business of billiard. I started from having 1 an now I have 2, working my way up to owning 4, best purchase I have made. very strong and value for money ... show more
Reviewed in the United States on August 29, 2025 by Sham davis
    • Great Product. Horrible Shipping. Great Product. Horrible Shipping.
Size: 12" Style: Without Case
Review Image by JC
Review Image by JC
Review Image by JC
Review Image by JC
This equipment is probably the best I have used. I have people I work with that own it so I have some experience using it and wanted my own. The star off is do to the very disappointing shipping. The product was shipped in a plastic Fedex bag in just the box which is not sealed or padded. The box was thrashed and the level was received inside the plastic bot not in the box. The corners and a side were dented so it will not sit level. Why they would ship a precision tool in such a manner makes no sense. Amazon was great about letting me return this and getting refunded. ... show more
Reviewed in the United States on November 27, 2025 Reviewed in the United States on November 27, 2025 by JC
    • World's Greatest Level
Size: 12" Style: Without Case
I was amazed of the accuracy of a machinists type of level vs a good carpenters level. No comparison, and Starrett, as anyone knows has a reputation that is second to none. When I borrowed my brother's Starrett 8" machinist level, and used it to level my pool table, it truly did the job so well, that it's almost like magic, seeing how straight the balls could actually roll, and even when hit slow, they continue on their straight path with no variation at all of getting off course. I had been trying to get one of these for over a year on e-bay, but gosh, the prices were always over $100.00 even for those that could have been taken better care of. I finally decided to pay a little more and just get a new one. It will easily hold its value by taking care of it, and in 30 years time, will be worth more if not abused. Next project will be a plane, and needed something I could truly rely on to level the table with. It already made a believer out of me with how well it leveled my pool table. I use digital levelers on occasion, but trust this one more. And 100 years down the road to whomever inherits and still has this level, if they had taken care of it, it'll still be as good as the day I bought it. One can't say as much for electronic levels and will probably be lucky to get ten years use out of them. Their displays have a tendency to go out, and they are a bit finicky. It's nice when old fashioned technology trumps some of this new stuff. This is one such case. ... show more
Reviewed in the United States on July 10, 2014 by J. Lile
    • Well made super accurate
Size: 8" Style: Without Case
Well made classic machinist level
Reviewed in the United States on December 31, 2025 by Paul R.
    • There is level and then there is Level! Pool Players Must Have.
Size: 6" Style: Without Case
There is level and then there is Level! This is a must have for Pool Players. I leveled the bar pool table with two conventional levels. Then I took 12 readings with this all around the table. The conventional levels were way off even though they read level. When it was close to center on this machinist level, it was the most level pool table I have ever seen. Simonis cloth and this level make for a dream table. Super slow shots go straight into the rail and come back and hit the cue right on the money. ... show more
Reviewed in the United States on June 9, 2024 by HerMan

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