Precision Brand PRE12925 Roll Pins Assortment 300 Piece

The Precision Brand PRE12925 is a roll pin assortment, 300 pieces.

A roll pin — a spring pin — is a strip of spring steel rolled into a tube with a gap along its length, and that gap is the whole design.

The pin is made oversize for its hole. Driving it in compresses it, and the spring steel pushes back against the bore for the life of the joint. That means a roll pin fits a hole that was merely drilled rather than reamed, because the pin conforms to the hole rather than the hole having to match the pin. It also cannot work loose from vibration — the spring tension does not relax.

Compare that to a solid dowel, which needs a reamed hole to a tolerance, and the appeal is obvious. Roll pins are why enormous numbers of machines are assembled with drilled holes and a hammer.

The trade is precision. A roll pin locates approximately, because it compresses. Anything needing exact location wants a dowel or a taper pin.

They are also consumables. A roll pin driven out is fatigued and should not be reused — it has lost the spring tension that made it work.

A 300 piece assortment is the right stock: sizes are unpredictable and a missing pin stops a repair.

Applications include machinery, automotive, and equipment assembly.

Brand

Precision Brand

SKU

PRE12925

Category

Fasteners

Weight

2.4 lbs

Dimensions

6.50 x 1.25 x 1.25

Price

$58.00

Availability

In stock

Rating

4.4 / 5.0