A Guide to Power Hammers: Types, Mechanisms & Applications

Types of Power Hammer

Powered Forging Hammers, known to many simply as Power Hammers. 
There are many different types of power hammers, but in practical terms they fall into three main groups.

These are self-contained pneumatic power hammers, utility power hammers, and mechanical power hammers.

There have been other styles over the years, which we cover in more detail in our history of power hammers article, but these three are the main types you will come across today and the ones we will focus on here.

Mechanical Power Hammers

You will hear some blacksmiths say that a mechanical hammer is not worth the floor space, but that is certainly not the case.

There are many well-known mechanical hammers from across Europe and America, as well as the famous Japanese spring hammers. Mechanical hammers are still being made today in India, along with some brilliantly inventive “junkyard” hammers coming out of Indonesia, and the classic tire hammers built across the USA and beyond.

Older machines include names such as Ajax, Goliath, Beaudry, and of course, arguably the most well-known, the Little Giant.

Mechanical power hammers work by converting rotational motion into a repeated striking action. In most cases this is done using a motor connected to a crank, spring or linkage system, which lifts and drops the ram in a controlled cycle.

Unlike pneumatic hammers, there is no compressed air involved. The force of the blow comes from the mechanical movement itself, often assisted by springs that store and release energy through each stroke.

This gives mechanical hammers a very distinct feel. The rhythm is set by the machine, and while there is some control, it is not as adjustable or responsive as a pneumatic hammer.

That said, in the right hands they are extremely capable machines and have been used for generations to produce serious work.

Blacksmiths such as Derek Melton are very much of the opinion that both pneumatic and mechanical hammers have a place in the workshop, if space allows.

The pace and style of a mechanical hammer lends itself well to repetitive work. Many find they are excellent for drawing out stock in a consistent way, and multiple mechanical hammers can work very well in production-style environments.

Self Contained Pneumatic Power Hammers

Self-contained pneumatic power hammers are what most people picture today when they think of a modern forging hammer.

They work using compressed air to drive the ram, but unlike Utility Hammers, everything is built into the machine itself. This makes them far simpler to install and run in a typical workshop environment.

The key difference is control. A pneumatic hammer allows the operator to vary the force of each blow, from very light taps through to full power strikes, often within the same sequence. This gives a much higher level of control compared to a mechanical hammer.

In use, they feel more responsive. You are not working to the rhythm of the machine in the same way, you are controlling it.

Because of this, they suit a wide range of work. From general blacksmithing through to more controlled forging, knife making, and detailed work where precision matters.
For many modern workshops, this flexibility is what makes them the go-to choice.

The sheer range that modern Self Container Power Hammers come in make them a great asset for all sorts of users, from home shop hobbyists, to huge industrial forging factories. From making bottle openers to making automotive and aerospace parts and beyond.

Utility Power Hammers

Utility hammers sit somewhere between.
They are often simpler in design and can vary quite a bit depending on how they are built.
In many cases they are designed to be more accessible, either in terms of cost, construction, or maintenance.

They can be effective for general forging work, particularly in smaller shops or where a simpler setup is preferred.

That said, they tend to be more limited in control and versatility compared to pneumatic hammers, and less refined than well-built mechanical machines.

They still have their place, particularly where simplicity and practicality are valued over precision.