Mandrel and Wiper Die Selection

The table below is a basic guide for identifying the mandrel type, any necessary number of balls and wiper dies.

Wall Factor =	Tube Outside Diameter
	Wall Thickness

"D" of Bend =	Bend Centerline Radius
	Tube Outside Diameter

Mandrel and wiper die selection chart if thin wall (close pitch) style of mandrels preferred
	"D" of bend
		1	1.25	1.5	2	2.5	3	4	5
Wall Factor	10	M1	M1	M1	M1	P	P
	15	M1W	M1W	M1	M1	P	P
	20	M2W	M2W	M1W	M1	M1	M1	P
	25	M3W	M2W	M1W	M1W	M1	M1	M1
	30	M3W	M3W	M2W	M2W	M1W	M1	M1	M1
	35	M3W	M3W	M3W	M2W	M2W	M2W	M1	M1
	40	TW4W	M3W	M3W	M3W	M3W	M3W	M2W	M2
	45	TW4W	M3W	M3W	M3W	M3W	M3W	M2W	M2W
	50	TW4W	TW4W	TW4W	TW4W	M3W	M3W	M2W	M2W
	60	TW4W	TW4W	TW4W	TW4W	TW4W	M3W	M2W	M2W
	70	TW5W	TW5W	TW5W	TW5W	TW4W	M3W	M3W	M2W
	80	TW5W	TW5W	TW5W	TW5W	TW4W	TW4W	M3W	M2W
	90	TW5W	TW5W	TW5W	TW5W	TW5W	TW4W	M3W	M3W
	100	UTW8W	TW5W	TW5W	TW5W	TW5W	TW4W	TW4W	TW4W
	125	UTW8W	TW5W	TW5W	TW5W	TW5W	TW5W	TW4W	TW4W
	150	UTW8W	UTW8W	UTW8W	UTW8W	TW5W	TW5W	TW5W	TW5W
	175	UTW10W	UTW8W	UTW8W	UTW8W	UTW6W	TW6W	TW6W	TW6W
	200	UTW10W	UTW10W	UTW10W	UTW10W	UTW8W	TW9W	TW8W	TW8W
	225		UTW10W	UTW10W	UTW10W	UTW9W	UTW10W	TW10W	TW10W
	250			UTW10W	UTW10W	UTW10W	UTW10W	UTW10W	UTW10W
	275			UTW10W	UTW10W	UTW10W	UTW10W	UTW10W	UTW10W

P = Plug mandrel
M = Standard pitch mandrel
TW = Close pitch mandrel
UTW = Ultra close pitch mandrel
# = Number of balls
W = Wiper die required

Example 1: Bending 2.0" od x .065 wall x 3.0" clr

Wall Factor =	2.00	= 30.7
	.065

"D" of Bend =	3.00	= 1.5
	2.00

Example 2: Bending 60mm od x 1.2mm wall x 90.0mm clr

Wall Factor =	60.00	= 50
	1.2

"D" of Bend =	90.0	= 1.5
	60.0

Example 3: Bending 127mm od x 2mm wall x 170.0mm clr

Wall Factor =	127.00	= 63.5 (70)
	2

"D" of Bend =	170.0	= 1.3 (1.5)
	127.0

It is always recommended to consult with someone on our Sales or Quoting Team for additional information since tool selection is dependent on so many factors.