There are many different types of presses, and many different ways to categorize them. This can make it difficult to find the right press for your shop or factory. In this blog post, we’ll talk about toggle presses, what they are, and some alternatives to a toggle press for your operation.
What is a Toggle Press?
In simple terms, a toggle press uses two interconnected levers to vertically propel the ram and create force. An operator uses the first lever to initiate a secondary toggle lever, which is connected with a rivet. The other end of the second level connects to the press’s ram or piston, which then exerts the desired amount of force on the sheet metal or another workpiece.
Toggle presses may be manual, electric, or pneumatic. Pneumatic toggle presses use compressed air instead of manual force to drive the ram. In these presses, the overall operation is very similar, but compressed air moves through the first toggle mechanism, which engages the secondary toggle and then drives the piston.
Advantages and Disadvantages of Toggle Presses
The “toggle” in toggle press refers to the device used in the press to drive the ram. There are many different types of devices and actions used to drive the ram in different presses. The toggle mechanism in the press has some functional and practical advantages, as well as some disadvantages.
Toggle presses are versatile, with varying levels of force and power. Manual and electric toggle presses are also relatively affordable and easy to integrate into your shop, with no other connections or utilities needed.
Yet there are also some disadvantages of toggle presses. The connection between the toggle press levers can be easily broken. Long-term use puts pressure on this connection point, and it can snap. The multiple moving parts in a toggle press make it more prone to frequent maintenance and repairs. Manual toggle presses also require more force from the operator, which can put them at risk for repetitive stress injuries.
Alternatives to a Toggle Press
As previously mentioned, a toggle refers to the type of mechanism driving the ram. This driving mechanism is one way to categorize different types of presses. They might also be categorized by the type of power they use, including manual, pneumatic, hydraulic, or hydropneumatic, the amount of force they exert, or the type of incline or frame they use. Different presses may have different combinations of these attributes, each with their own advantages and disadvantages.
With this in mind, let’s take a look at a few alternatives to toggle presses, and specifically looking at the mechanism which drives the ram. Keep in mind that this list is not exhaustive; you may encounter other presses with other types of mechanisms.
- Screw Press: A screw or percussion press uses a flywheel driven by a friction disk and rotating screw to engage the ram. This type of press is generally used exclusively for sheet metal work, since there are some limitations to the movement of the ram.
- Rack & Pinion Press: These types of presses perform long strokes, and they often work faster than other types of presses. However, they’re generally not suitable for heavy-duty work. In these presses, a small gear, known as a pinion, and a vertical rack drives the ram.
- Eccentric Press: This press is named for the revolving mechanism revolving around a vertical shaft. The shaft is not attached centrally to the mechanism, which is known as an eccentric. The revolving motion of the eccentric and the shaft together drives the ram in this press.
- Crank Press: This is a relatively simple type of press. In this press, a flywheel drives a crankshaft, which creates rotating motion. A connecting rod turns this rotational motion into reciprocating motion, which drives the ram.
- Cam Driven Press: This press uses a sliding linkage called a cam to move the ram. Springs restore the ram back to its starting position.
- Knuckle Press: This type of press uses a particular mechanism called a knuckle joint to drive the ram. A knuckle joint connects two rods under tension, and drives the ram with the crankshaft. This type of press is ideal for jobs requiring more force, like extruding.
Direct Acting Hydraulic, Hydropneumatic and Pneumatic Presses
Most hydraulic, hydropneumatic (or air over oil) and pneumatic presses are direct acting, where the press cylinder, powered by air, oil or a combination of the two, directly drives the ram.
A hydraulic press requires a high voltage power source as well as hydraulic fluid to drive the press. This type of press uses the compression of the hydraulic fluid to drive the ram. Hydraulic presses are alternatives to toggle presses in high force range.
A hydropneumatic press uses a similar method to drive the ram, but the combination of pneumatic and hydraulic mechanisms makes the press more efficient and easier to use and maintain. While hydraulic presses are often prone to leaks and other hazards, hydropneumatic presses are generally safer.
For toggle presses with a lower force range, pneumatic presses make excellent alternatives. Powered by compressed air alone, pneumatic presses are the most efficient of these three options and also require the least amount of maintenance.
Browse information and recommended presses by Industrial Press Application >
If you’re not sure what type of press is best for you, talk with our press experts. We can tell you more about the presses we have available, and help you find the right fit for your needs.