Calibore Bolt Testing Equipment
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Calibore 100 2

Norwolf Calibore 100
Image of a Calibore 125 Bolt Tension Calibrator

Norwolf Calibore 125
The Norwolf Calibore 150 is a large industrial torque tester with a dial gauge, calibration details, and "Made in the USA" labeling.

Norwolf Calibore 150
Image of a Calibore 200 Bolt Tension Calibrator

Norwolf Calibore 200
Calibrore 250

Norwolf Calibore 250

Norwolf Tool Works offers the lightest, most compact and versatile bolt tension measuring devices in the industry. Their Calibores are an all-in-one solution that doesn’t require any additional tools to assemble so you can get right to work.

Bolt testing is required in applications such as steel buildings, bridges, and similar structures, performed for two main purposes:

We stock Norwolf Calibore bolt tension measuring devices, which are available for purchase or rent, including these models:

  • Model 100 (for 1/2″ to 1-1/8″ bolt diameters)
  • Model 125 (for 5/8″ to 1-1/4″ bolt diameters)
  • Model 150 (for 1/2” to 1-3/8” bolt diameters)
  • Model 200 (for 1-3/8” to 1-7/8” bolt diameters)
  • Model 250 (for 1-3/8” to 2” bolt diameters)

We offer a large inventory of bushings, plates, and other accessories.

Bolt Testing Devices

There are two primary manufacturers of bolt tension calibrators, Skidmore-Wilhelm and Norwolf Tool Works. Both manufacturers produce excellent quality products that are cost competitive and offer many similar features. There are some features that set the manufacturers apart, but ultimately the choice comes down to one of personal preference and what fits the individual needs of a company or project.

To Get Started:

For information about Calibore rental and purchase options, parts availability or related requests, please complete the form on this page:

Request a Quote

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For All Your Calibore Bolt Testing Needs, Turn to GWY

Extensive Inventory
We offer the full line of Calibore bolt tension measuring devices and all the accessories to match each model.

Partnership Mindset
Since 1975, providing long-term value through customer service has been our top priority.

On-Site Repairs
We have the equipment, parts inventory and experience to service your tools and equipment.

Full-Service Expertise
Our team has the knowledge, expertise and drive to help you deliver absolute accuracy at every turn.

Testimonials

Kind words from our customers:

  • “It was a great pleasure working with GWY. They go above and beyond to help with what we needed. Don was very quick on getting what we needed out to us to complete the job. Very proud to be a GWY customer.”

    Bobby
    HB Metal Builders

  • “I have enjoyed working with GWY. Their people know their product well. Their prompt response and delivery of the product is as good as any service Ogeechee Steel has ever had the pleasure of doing business with.”

    David
    Ogeechee Steel

  • “From choosing the right equipment for each job’s unique requirements to problem solving in the field, GWY is always willing to go out of the way to find a solution. Mix that customer service in with their technical expertise and easy-to-use tools, they really help make bolt up easy.”

    Jake
    South Capital Bridgebuilders

  • “GWY has been a great company to work with. My company requires receipts for all credit card purchases and GWY has made this very easy. With rental equipment this usually isn't the easiest to deal with but they have made this process very smooth. I get a weekly receipt emailed to me without having to ask for it. They also have great customer service and are very helpful and friendly. Would definitely recommend.”

    Jeremy
    Faith Technologies, Inc.

  • “GWY’s parts inventory and response is top notch. You can expect prompt, respectful, knowledgeable answers to questions and full cooperation when you need it. Truly a mark of a reputable company with a good team.”

    Ron
    GEM Inc.

  • “Thanks for all that you do for us. We really appreciate all the support over the years and the continued relationship your team has with our team. We couldn't build the future without the assistance of your products, services, and the team that backs it.”

    Sean
    LPR Construction

FAQs

Your questions, answered.

Do you bill by the month for rentals?

We typically bill by the week but we’re working on a monthly option.

Do you sell tools outside the country?

Yes, we provide tools all over the world.

Does the tool come with anything?

All of our tools come with a case. Wrenches come with one socket size, as well as screwdriver to change sockets. Turn-of-Nut and torque wrenches have an additional screwdriver to set the torque/angle. Depending on the model, a safety card, cord chart, and a tool manual is included. Cordless tools come with two batteries and a charger.

How fast can you get my Calibore back to me?

We know that going even just a few days without your tools can be bad for business. That’s why we pride ourselves on our rapid turnaround times. Average turnaround is typically just a few days, but we can provide same-day calibration and return shipping for urgent needs.

How long are your rental periods?

The minimum rental period is one week. There is no maximum rental period — we will work with you for however long you need the tool.

How much does Calibore calibration cost?

Calibration fees vary depending on the tool and are a one-time set price unless other repairs are needed. Customers are responsible for shipping costs. The quickest way to find out the cost for calibrating your Calibore is to fill out our calibration request form below.

What is the lead time on getting this tool to me?

If we have it in stock, we can send it next day air within the US to get to you tomorrow.

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