What is the hardness of a dowel pin?
In accordance with ASME B 18.8. 2, hardened ground machine dowel pins have a core hardness of RC 47-58 and a minimum case hardness of RC 60. Surface finish is 8 microns inch maximum. Dowel Pins are made 0.0002″ over a standard diameter and are fit into a reamed hole.
How are dowel pins made?
At its simplest, a dowel pin is just a solid cylinder of material, which is inserted through a hole. When a dowel pin is inserted through concentric holes in two or more components, it locates and holds them together. Alternatives to steel dowel pins include roll pins (slotted or spiral), grooved pins and cotter pins.
How long should a dowel pin be?
Twice this length is a common rule of thumb for determining dowel length. For example, if your shortest member is 1” thick and you know your safest drilling depth is 3/4”, then a 1-1/2” dowel should be used. A 1-1/2” length equates to two times the 3/4” thickness. The longer the dowel, the greater the holding strength.
What is the function of dowel pin?
In a manufacturing setting, dowel pins are solid, headless, cylindrical metal rods that have been machined to specific tolerances. These pins are typically used to align, locate, or join component to absorb lateral stress. However, they can also be used as a pivot, shaft, or hinge.
What is the purpose of dowel pin?
What is a dowel pin used for?
fastening device Hardened and precisely shaped dowel pins are used to keep machine components in accurate alignment; they are also used as location guides for adjacent machine parts and to keep the two sections of a punch and die in alignment.
In accordance with ASME B 18.8.2, hardened ground machine dowel pins have a core hardness of RC 47-58 and a minimum case hardness of RC 60. Surface finish is 8 microns inch maximum.
Why is a dowel pin pressed into a reamed hole?
Due to the high hardness design of the pin’s surface, a dowel should be pressed into a reamed hole with a hammer made of softer material, rather than hammered or driven. This prevents the pin from shattering and causing injury.
Can a pull out dowel pin be used?
Pull-out dowels are not referenced by any standard of ASTM or ASME, but by custom, have the same hardness as hardened ground machine dowel pins. Standard dowel pins fasten parts and maintain consistent alignment. A chamfered end provides easy dowel pin insertion. Standard round (not vented): Have a smooth finish.
Which is better for a dowel, titanium or steel?
Titanium is strong, with good temperature and corrosion resistance. It is 44% lighter than steels. Plastic dowels are formed via plastic injection molding. After material, dowel pin sizing is the other major specification manufacturers need to consider. Outer diameter is the measurement across the edges that form the dowel pin’s width.