Rubber Hammer

Quick Answer: The Rubber Hammer is a small hammer whose striking head is made of rubber rather than steel. A rubber hammer delivers a soft, non-marring blow, used in physics labs to set tuning forks vibrating and elsewhere to tap parts into place.

Soft Blows, Clean Notes

A tuning fork is designed to vibrate at one frequency, and how it is started affects the sound. Hitting it with metal can chip the prongs and excites high overtones that ring over the note; a rubber head spreads the impact over a larger area and a longer time, so the fork settles into its fundamental quickly. With the fork held by its stem, a light tap near the tip of one prong is enough. Students who strike forks against a surface can use a rubber pad instead.

Outside sound experiments, the same soft head is useful wherever a steel hammer would dent or mark the work: knocking a snug lid onto a tin, tapping a wooden peg or dowel home, or nudging a clamp or boss head along a rod. It should never be used on glassware, which can crack under any impact.

For heavier workshop jobs, a steel club hammer delivers far more force but marks what it strikes, so the two tools complement rather than replace each other.

Specifications

Applications

• Setting tuning forks vibrating for resonance-tube, sonometer and beat experiments
• Tapping wooden pegs, dowels and joints during apparatus assembly
• Aligning clamps and boss heads on retort rods without marking them
• Light assembly work on models and kits in STEM and workshop classes

Care & Handling

• Strike tuning forks lightly near a prong tip; a heavy blow can bend the prongs.
• Never use the hammer on glassware, including stoppered glassware.
• Keep the rubber head away from oils, solvents and heat, which soften or crack it.
• Check that the head is secure on the handle before use, and replace the hammer if it is loose.

Why Choose LabEquip

Physics labs usually order one hammer for each set of tuning forks, and technicians keep one for apparatus assembly. LabEquip lists it under General Lab Products; ask about sizes through the contact page.

Frequently Asked Questions

Why use a rubber hammer on a tuning fork?

Rubber gives a soft blow that starts the fork at its natural frequency without damaging the prongs or exciting harsh overtones. A metal striker can chip the fork and adds a clang to the note.

How hard should I strike the fork?

Lightly. A brisk tap near the tip of one prong is enough to produce a clear note. Heavy blows do not make the note last much longer and can bend the prongs, changing the frequency.

Is a rubber hammer the same as a rubber mallet?

They work the same way. Mallet usually describes a larger tool for woodwork, flooring or tiling, while the laboratory version is smaller and lighter for delicate apparatus and tuning forks.

Can I use it to tap a stuck stopper out of glassware?

No. Any impact on glass risks cracking it. Free a stuck stopper by twisting, warming the neck gently or soaking, not by hammering.

Why does the rubber head leave black marks?

Some rubber compounds transfer marks onto pale surfaces. Wipe marks off with a mild detergent; a non-marking head avoids the problem on finished surfaces.

Does the rubber head wear out?

Over time it hardens, cracks or chips, especially if exposed to heat, sunlight or oils. A hardened head strikes more harshly, so replace it when the rubber no longer feels resilient.

Last Updated: September 2026