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.