Roymech engineering encyclopedia

Taper Pins



Roymech
Solid Print 3D




Taper Pins

Unhardened taper pins generally to BS 5681:1979

Nom Dia d (h10 ) 0,6 0,8 1,0 1,2 1,5 2,0 2,5 3,0 4,0 5,0 6,0 8,0 10,0 12,0 16,0 20,0 25,0 30,0 40,0 50,0
a (approx) 0,08 0,10 0,12 0,16 0,20 0,25 0,30 0,40 0,50 0,63 0,80 1,00 1,20 1,60 2,00 2,50 3,00 4,00 5,00 6,3
l (Length Range) 4 to
8		 5 to
12		 6 to
16		 6 to
20		 8 to
25		 10 to
35		 10 to
35		 12 to
55		 14 to
55		 20 to
60		 25 to
90		 25 to
130		 30 to
160		 35 to
180		 40 to
200		 45 to
200		 50 to
200		 60 to
200		 80 to
200		 100 to
200


A taper pin is a fastener used in mechanical engineering. They are steel rods with one end having a slightly larger diameter than the other. Standard inch-sized taper pins have a taper on diameter of 1:48 while metric ones have a taper of 1:50. (A 1:48 taper means that one end of a 4-foot-long bar (48 inches) will be 1 inch smaller in diameter than the other end, or a 1/4 -inch taper over a 1-foot length. A 1:50 taper means that one end of a half-meter long bar (50 cm) will be 1 cm smaller in diameter than the other end, or a 2 mm taper over a decimetre length.)

Taper pin reamers are designed to prepare the hole for taper pins. Metric taper reamers are designated by the small diameter. For example, a 2 mm taper pin reamer has a 1.9 mm small end (2 mm nominal size) and a 2.86 mm large end.



Useful Links
  1. Fuller Metric ..Supplier of Fasteners