How to use one-handed hammers

Uses of One-Handed Hammers

One-handed hammers, also called pound hammers or ball-point hammers, are hammers with an iron head that has two types of striking surfaces: flat-headed (flat) and round-headed (spherical). The one-handed hammer is a tool used for all metalworking operations, including ironworking, and is also suitable for striking objects in heated conditions.

The flat head side is primarily used for driving pins, adjusting, assembling, and disassembling in metalworking operations. However, the flat head is not completely flat, but rather has a gently curved surface with a radius of 100R, which is designed to leave no strike marks on the object. The round head side can be used for riveting, stamping, and grinding, as well as for bending steel plates and other materials in a radius shape.

The nominal number of one-handed hammers ranges from 1/4 to 3, with the most basic nominal number 1 being 450 g (1 lb.) in weight.

図1-1図1-2

How to Use a One-Handed Hammer

The use of a one-handed hammer is basically the same as that of a standard hammer.

How to strike

When striking, such as hammering in a pin, be sure to strike so that the center of the striking surface is straight at the object.

Inspection

Before use, check the handle and head for deformation, cracks, chips, wobbling, or other irregularities.

Precautions for use

Hammers may seem to be simple tools, but if used incorrectly, they can lead to unexpected accidents. Here are some precautions for using a one-handed hammer.

Striking Method

When striking, be careful to strike the object with the center of the striking surface of the head. If you strike with the peripheral part of the hammer instead of the center, the hammer may not strike as expected due to misalignment of the axis, or you may miss and injure other parts of the hammer or the operator's fingers. In addition, a shaky striking axis can cause a large horizontal or vertical swing, which may result in damage to the handle or chipping of the striking surface.

Wearing Protective Equipment

When striking, the object or the hammer itself may chip and scatter. Please work while ensuring operator safety by wearing protective glasses, etc., as necessary.

Head Repair

A one-handed hammer that has been used repeatedly may develop chipping or swelling around the periphery of the flat head. If such deformations occur, repair them with a lathe or grinder whenever possible. If the head of a one-handed hammer is worn out by 3 mm or more from its original length due to repeated use or repair, it should be regarded as the end of the product's life and replaced with a new one.

Prohibition of Use for Other Purposes

Since the head of a one-handed hammer has a flat head on one side, it may look at first glance as if it can be used for nailing in ordinary woodworking work, etc. However, please refrain from using the hammer for any other purpose. The one-handed hammer is heavier than a typical woodworking hammer and is not suitable for anything other than metalworking work. The flat head also has a gentle curve that makes it slippery and may cause damage to the object by slipping.

Beware of rust and damage.

Since the one-handed hammer has a steelhead, it is necessary to pay attention to rust and damage. It should not be left with significant dirt or stored in a hot and humid environment, as this can cause rust. Always inspect the product for any irregularities before use.

Summary

A one-handed hammer is an indispensable tool for sheet metal, forging, riveting, pin hammering, and other metalworking job sites. Please follow the correct usage and use it safely.