Category Archives: MRO

Worm Gear Essentials – Tonnage

This week, we continue our review of the white paper “How to Size a Worm Gear Screw Jack” by looking at the role Tonnage under load can affect the sizing of the linear motion system.

The load capacity of a jack is also limited by the physical constraints of its components, such as its drive sleeve, lift shaft or bearings. All anticipated loads should be within the rated capacity of the jack. Loads on the jack in most applications include: static loads, dynamic (or moving) loads, cutting forces or other reaction forces and acceleration/deceleration loads.

For shock loads, the peak load must not exceed the rated capacity of the jack, and an appropriate design factor should be applied that is commensurate with the severity of the shock.

For accidental overloads not anticipated in the design of the system, jacks produced by Nook Industries can sustain the following overload conditions without damage: 10 percent for dynamic loads, 30 percent for static loads.

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Worm Gear Essentials – Horsepower

The following is taken from an excellent white paper from Ron Givannone, Director of Application Engineering and Business Operations at Nook Industries (hyperlink). Titled “How to Size a Worm Gear Jack,” it looks at the key factors in figuring out what size and configuration of jack will work based on the needs of your application. Over the next few weeks, we’ll look at the different factors, and offer a bit more background.

This week, how Horsepower limitations can affect jack sizing.

When determining the lifting power of a jack, it’s a common mistake to assume the lifting capabilities of a jack are determined solely by its tonnage size. The load’s capacity is more often determined by its horsepower limitations. For example, a 10-ton jack may only be able to lift a one-ton load, because it is temperature-limited by the working horsepower it requires to lift the load.

The horsepower limit of the jack is a result of its ability to dissipate the heat generated from the inefficiencies of its components. The maximum horsepower value represents the point at which the heat that is generated by the working horsepower to move a given load meets the maximum temperature of the internal components. The working horsepower to move a given load is calculated by using the following formula:

How well a jack can dissipate heat is influenced by many application-specific variables, including mounting, environment, duty cycle and lubrication. The best way to determine whether performance is within horsepower limits is to measure the jack temperature. The temperature of the housing near the worm gear must not exceed 200 degrees Fahrenheit.

Looking for help in figuring out the right horsepower? Here are some tools:

Calculate Horsepower with this calculator

Calculate Kilowatts

Worm gear jacks definitions and technical data

Linear Motion 101 – Learn From the Pros

Just a click away are over 20 linear motion videos.  Want to learn the basics of a ball screw jack?  Perhaps, you need to load a standard ball nut?

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Tackling a Trade Show

A guest blog post from Erin Lease Hall, CTSM at Nook Industries.

According to a CEIR (Center for Exhibition Industry Research) study, 39% of attendees spend less than eight hours visiting a trade show. As the Nook Industries Trade Show Manager, planning and preparation are my essential keys to a successful exhibition, but it is also the main ingredient to maximizing time on the trade show floor as an attendee. Whether you are a first time attendee or an old pro, here are some tips and tricks to get the most out of walking a show.

Game Plan
Plan ahead and set objectives. The more time and effort you put into it, the more you will get out of it! Go over the show guide online and mark your must-see’s and want-to-see’s. Prioritize your route on the online map, with must-see’s first and decide how much time you want to spend at the show and then at each booth. Allow extra time for browsing, distractions and waiting in lines. There are lots of cool things at shows and they are great for sparking ideas. One of the great assets of attending a trade show is that we come face to face with concepts and ideas which we have may never have considered as options or have dismissed.
Divide and conquer! If you are attending with co-workers compare and share your game plans so you aren’t doing double-duty.

Pre-Show Prep
Register for the show with complete information, which will allow vendors to quickly scan your badge and have the information on hand to follow up with you. Register for seminars or workshops you want to attend. These are great networking events!
Book a hotel room using the show rate online and have a transportation plan, whether it be taxi, Uber, show shuttle bus (a perk to booking through the show site – but if you are booked nearby, you can always get the shuttle by waiting in the lobby of a hotel on the shuttle line), or the nearest parking lot to the convention center.

Set appointments with vendors if possible. Pack a small snack, bottle of water, a mobile phone portable charger, a pen and notebook, and lots of business cards. Plan to wear comfortable shoes! Bring a bag or a back pack if you plan to collect materials. Take the alternative to have literature mailed or emailed to you so you don’t end up carrying around a lot of materials.

Game Time!
It is easy to be overwhelmed once you get to the show venue. Take advantage of coat/bag check. Take a minute to check over the printed directory and make sure your game plan is still on track.
Have specific questions ready during your booth visits and don’t be afraid to push for an answer! Don’t be shy about telling a vendor you are on a tight schedule. Avoid casual conversation if you don’t have time for it and focus on the task at hand. Pass by booths that do not interest you, the exhibitors won’t mind. They want to devote their time to potential customers.
Quickly summarize your visit in booths that interest you in your notebook or make a note on your phone about your experience if it is something you want to follow up on. It’s a long day and the appointments might start to run together.
Follow Up

Don’t waste the information gathered at the show – file the information you have gathered or share with your colleagues if you don’t need it, as you probably know someone within your organization who does.
Long hours on the trade show floor are enough to wipe anybody out. But before you hit the bar for happy hour or crash for the night, take some time to organize the information you’ve gathered. If it’s for co-workers back at the home office, sort it into envelopes and address them to the relevant person. If the information is for you, sort it by priority, affixing sticky notes to jog your memory after you’ve returned from the show.

Come check out Nook Industries in booth S-7890 at PackExpo 2105 in Las Vegas, and at the  Automation Fair in Chicago this November  and see how we Make Motion Work.