An Innovative, Three-Piece Nut for Industrial Bolting That Waited 300 Years

Why would anyone consider replacing the nut at the end of their bolt with a three-piece nut? As the standard threaded connection of today originated in the 1700’s, shouldn’t 300 years be long enough to wait for something new? The three-piece nut deserves consideration because it guarantees a reliable connection, doesn’t get stuck and is safer than the standard.

First, here is a description of the standard and the three-piece nut:

– The standard industrial nut is a hexagon shaped metal block with a threaded hole in the middle. The hexagonal shape fits the tightening wrench and the threaded hole mates with the bolt. Tightening with a torque force rotates the nut along the bolt and stretches the bolt to provide the tightening load.

– The three-piece nut consists of three cylindrical parts: an outer sleeve, a washer and an inner sleeve. The inner sleeve threads to the bolt and by turning the outer sleeve with a torque force, the three-piece nut stretches the bolt and provides the tightening load. All relative movements take place within the nut. The three-piece nut does not rotate along the bolt.

The goal of any bolting operation should be to quickly and safely produce a reliable bolting connection. Let’s look at the problems created by the standard industrial nut and how the three-piece alternative resolves them.

Problem Solved #1 – Bolt failures due to inaccurate bolt loads

Standard bolted connections fail because unknown friction forces cause over or under tightening. The main problem with using torque to tighten a standard nut is the variability of tightening load resulting from the applied torque load. Friction forces between the nut, bolt and mounting surfaces significantly affect the tightening load produced by the torque force. Because the three-piece nut has no relative movement between the inner cylinder and the bolt and between the washer and the mounting surface, these frictions are not relevant. All the movement is contained within the three-piece assembly where the friction is tightly controlled.

Problem solved #2 – Removal problems due to thread damage

It is always more difficult to unscrew a standard nut than it was to screw it because thread damage and corrosion increases friction between the mating threads and mounting surfaces. With the three-piece assembly, all relative movements take place within the nut. Bolt thread and the mounting surface friction increases are not relevant to removal. Special design considerations, material selection and lubricant in the three-piece nut guarantee that removal friction is controlled.

Problem Solved #3 – Elimination of pinching dangers on reaction points

People are injured while tightening standard nuts. The equipment that is used to screw and unscrew the standard industrial nut requires a reaction arm to hold the tool in place during operation. As this arm must react against a solid surface, it presents the perfect opportunity to pinch fingers while in use. The three-piece unit eliminates the need for a reaction arm since it reacts internally against the mounting surface thus eliminating the pinch point.

The standard nut is long outdated for industrial applications. Three hundred years is long enough to wait for a new nut design. The three-piece nut eliminates many of the problems created by the standard nut and should be considered for every industrial bolting application.

3 Benefits of Multi-Pallet Shipment

One of the principal issues when it comes to shipping is whether or not to use palletized freight or non-palletized freight. Odds are that if your business relies on shipping, then you will often utilize multi-pallet shipment. The pallets, or boxes, are easily aligned and can be stacked for maximum efficiency and durability, making them a popular choice for many companies. The following list highlights the major benefits of multi-pallet shipment:

1. The first benefit to be found is cost-efficiency. If you are in a situation in which your company needs to ship high-volume amounts of goods, then you will gain a significant financial advantage with pallet pricing. If you have experience with the shipping industry, then you know that it is common practice to receive standard carrier pricing for most items. This method of pricing is based on the weight, as well as the type of goods to be shipped. However, if you plan to move large quantities of items then you can negotiate with carriers to receive special pallet- pricing. This fee is based on a set amount per pallet, regardless of the total weight, saving you a significant amount of money in the long run. An extra bonus to pallet-pricing is that you can delay the receipt of a product for even cheaper rates.

2. The second benefit of multi-pallet shipping is the ease of movement it affords. Depending on how much you want to export, you can partner with carriers that ship via sea, land or air. Many companies choose ground transportation because the goods can easily be monitored, loaded and unloaded. With a little bit of research, you can source products located nearby, giving you access to a truck and the ability to pick up your pallets at your own convenience. It is also possible to find quality multi-warehouse liquidators with loads closer to you and your customers.

3. The last benefit of pallet shipping is that it helps multi-piece shipments stay together and provides increased protection from damages. This is crucial, especially if you are shipping highly sensitive or delicate items. Because the pallets are portable and made of either wood or plastic, they are much more dependable than a cardboard box. Pallets can weigh anywhere from 20 to 70 pounds and provide more protection than standard shipping materials and packaging. With your goods secured in a pallet, you will protect them from any possible abrasions, punctures and compression damages that could occur during a shipment. Additional things to consider when choosing your pallets include using ones with closely spaced pallet deck boards and those with four-way forklift entry, as this improves ease of handling, loading and unloading. You can also further ensure protection by using stretch wrapping, strapping or banding.

With multi-pallet shipping, you can rest assured that your goods will arrive in top condition to their point of destination. As such, it is not surprising that so many companies rely on this method of shipment. Not only do they provide a great way to save space and money, they also afford you peace of mind, ensuring the longevity of your business.