9Pcs Steel Number (4mm)

Name: 9Pcs Steel Number (4mm)
Brand: Harden
SKU: 610854

Item No. 610854

Price on request

Marking a part permanently is a small job that matters a great deal, and a set of steel number stamps is how it is done. Each stamp carries a raised character on its face; you place it on the metal, strike it once with a hammer, and the character is driven into the surface. It cannot fade, cannot be washed off, will not come away with paint stripper, and survives heat, oil and years outdoors — which is exactly why it is the marking method used on things that must still be identifiable in a decade.

This is the 4mm set, and the size is the specification to choose on. Four millimetre characters are small: they suit tools, small components, plates and tags, machine parts, and anywhere the surface available is limited or where a large mark would weaken or disfigure the part. If the mark needs to be read at arm's length or from across a yard, the 6mm set is the one.

Nine pieces covers it because 6 and 9 are the same stamp turned over — a small economy that catches people out the first time they look for a nine and cannot find one.

The material is chrome vanadium, tempered and heat treated, and that is the correct specification. A stamp has to be considerably harder than the metal it is marking or the character face simply flattens out and the stamp becomes useless. Chrome vanadium — chromium for hardness and wear resistance, vanadium for grain refinement and toughness — gives a face that holds its detail through thousands of impressions and a body that will not shatter under a hammer blow.

The work: marking tools and equipment against theft, numbering parts and assemblies during a strip-down so they go back where they came from, stamping serial and asset numbers, marking date codes on maintenance work, numbering keys and locks, identifying components in a workshop, and stamping identification onto plant and machinery.

The buyers are engineering and fabrication workshops, vehicle and plant maintenance departments, tool rooms, locksmiths, jewellers and metalworkers, asset and equipment managers, and hardware dealers supplying workshops.

Getting a good result is mostly about setup. Support the work solidly on something heavy — a stamp struck on a springy surface gives a light, uneven impression. Mark a guide line and hold each stamp against a straightedge if the row needs to be straight, because freehand rows wander noticeably. Use one firm blow rather than several light ones, since a stamp that moves between blows produces a doubled, blurred character. And on important work, practise the sequence on scrap first — there is no undoing a stamped character. Ask on WhatsApp for a price, or for the number and letter sets together.