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Starrett 120JZ-6 Dial Caliper, Stainless Steel, Offset Jaw, White Face, 0-6" Range, +/-0.001" Accuracy, 0.001" Resolution

1.0 out of 5 stars 1 customer review

Price: $517.00 & FREE Shipping. Details
Only 1 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.

Specifications for this item
Brand Name Starrett
Part Number 120JZ-6
Style Name Offset Dial
Maximum Measurement 0-6"
System of Measurement Inch
Material Type Stainless Steel
UPC 049659658668
Additional Features Thumb roller, fine-adjustment, anti-backlash control
Color White
EAN 0049659658668
Item Depth N/A
Item Weight 1.4 pounds
Manufacturer Series Number 120 Series
Measurement Accuracy +/-0.001"
Number of Items 1
Range 0-6"
Resolution 0.001"
Specific Uses For Product Inside , Outside
Specification Met N/A
Tip Description Offset
UNSPSC Code 41111600

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Product Features

  • Precise dial graduations of 0.001", with one revolution equivalent to 0.100"
  • Thumb-operated fine adjustment roll allows for one-handed use
  • Lock screw holds the sliding jaw in position, to help ensure consistent measurement
  • Rack teeth point down to keep foreign matter from clogging the gear, to help prevent measurement error
  • Versatile adjustable jaw measures different planes that cannot be reached with a standard caliper

Product Description

The Starrett 120JZ-6 dial caliper measures 0 to 6 inches with 0.001” accuracy and has an adjustable jaw for measuring different planes that cannot be reached with a standard caliper. The adjustable 3-1/2” reference jaw can be made either longer or shorter than the sliding jaw. This handy measuring tool allows for reliable and accurate readings with the sharp, black graduations on the no-glare, satin-finished bar, crisp lines on the white dial face, and knife edge contacts for inside and outside measurements.

One full revolution of the dial is equivalent to 0.100”. The jaw depths on this caliper are approximately 1-1/2” for the outside measuring jaws and 5/8" on the inside measuring jaws. The knife-edge contacts can be used to scribe parallel lines on the workpiece. This caliper can be used with one hand through operating the fine adjustment roll with the thumb. The lock screw locks the dial bezel and holds the sliding jaw in position. The depth rod is integrated into the rack of the caliper, unlike many calipers which offer a detachable depth rod, or none at all. The hardened stainless steel components, including the bar, measuring surfaces, rack, gears, and depth rod, offer corrosion resistance, increased accuracy, and long life. Positive split gear anti-backlash control offers increased accuracy over standard gear configurations. Backlash is the amount of clearance between mated gear teeth in the caliper controls, which prevents the gear teeth from jamming. It is undesirable to have much backlash due to the lack of precision offered by the increased amount of play between gears. Certain gear designs can minimize or eliminate backlash; split gear systems actually split the gear into two gears, each half as thick as the original gear. One of these gears is then fixed to the shaft while the other gear is allowed to turn. The free-turning gear is connected to coil springs that rotate it until all the backlash in the control system has been eliminated. The rack teeth point down to keep foreign matter from clogging the gear operations. This prevents measurement errors where metal chips could interfere with proper caliper operation.

Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, machining, manufacturing, carpentry, and medicine. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The dial caliper is used also for measuring size differential between two objects. The digital caliper takes the same sort of differential measurements as the dial caliper by zeroing the display at any point along the slide, with an LCD (replacing the dial) that displays a single, easily read value in both English and metric units. Some digital calipers can hold data readings between measurements and send them to data collection devices.

The L. S. Starrett Company was founded in 1880, originally manufacturing bench vises, squares, and other tools. They acquired other companies throughout the years, expanding their services into making precision measurement instruments and tools, such as calipers, micrometers, saw blades, and gauges. Starrett is headquartered in Athol, Massachusetts and has manufacturing facilities in Brazil, the United Kingdom, China, and other locations.

Product Details

  • Item Weight: 1.4 pounds
  • Shipping Weight: 1.4 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B000VDZE8E
  • Item model number: 120JZ-6
  • Average Customer Review: 1.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #525,137 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Top Customer Reviews

The manufacturer commented on the review below
Verified Purchase
i'm new to machining and in the process of acquiring metrological tools/instruments. having heard about starrett's legacy of producing instruments of superb quality, as well as their recent decline, i have been buying used and old-stock items as i am able to find and afford them. i have been absolutely impressed with the feel, repeatability, fit/finish, durability and overall quality of the items that i have thus far. i am aware that many (or most) of starrett's products now come from china. to this point, i have been able to avoid these products. having only legacy starrett products i cannot do a side-by-side comparison of then and now, but i can only imagine from what i have heard (and what i can glean from images on the web) that the quality has indeed changed. this being said, i decided to purchase the 120jz-6 calipers because they are still made in the USA and assumedly still the best that money can buy. i firmly believe that one will never regret the purchase of a quality tool, regardless of price. buying a low quality tool at a low price may cause some regret when it fails but buying a low quality tool at a high price (and i mean REALLY high) will cause regret immediately and indefinitely (were it not for amazon's return policy). so, what's wrong with them? the first thing that i noticed was a heavy rattling sound as i removed the outer packaging, but the excitement of the emerging red box was forefront in my mind. i come to find that the adjustable jaw is clanking around in the protective case. the case does not allow for the adjustable jaw to be in place when stowing the calipers. the foam insert is relieved for fitment of the standard 120's and does not accommodate the longer jaw so it must be removed in order to fit.Read more ›
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The manufacturer commented on this review(What's this?)
July 13, 2015
First, let me apologize for the problems you experienced with your Starrett 120JZ-6 caliper. We will keep an eye out for it as it will be returned to us by Amazon. Our quality department will see it as well as your comments.
Starrett Dial Calipers have been received very well as reported in other Amazon reviews and I have not found another return of this model in calendar year 2015.
Starrett has been a Global Manufacturer for Over Half a Century.
It began in the 1950's with the establishment of facilities in Brazil and the United Kingdom. Today,
Starrett has nine manufacturing locations worldwide: Brazil, The U.K., China and five in the United States.
Most of the products in our catalog are made at a Starrett U.S. facility.
The rest are sourced from one of our global locations. The 120JZ-6 is manufactured in our US plant.
We do stand behind this product 100% as we do with all Starrett Tools.
Quality Assurance Policy
Starrett tools are made to the highest standard of quality and workmanship. We want every tool
in the hands of our customers to be accurate and satisfactory. If any tool is found not to be of
Starrett quality, please contact our customer service department to arrange a return of that tool.
Any tool proved to be defective in material or workmanship will, at our discretion, be repaired or
replaced at no charge.
If this caliper has not been returned to Amazon, it can be returned to us here at Starrett.
All warranty claims should be sent to:
Warranty / Repair Department
121 Crescent Street
Athol, MA 01331
Enclose a letter explaining problem
found and return address instructions.
Be assured that your comments do get directed to our Quality Department.

John Richardson - Starrett Tech Support