Comparative Chart
Cast Iron vs. Steel

Weight in pounds - Size in inches
Anchor
Weight
A
--B--
--------------
A
B
25
12
21
-----------
17
27 1/2
50
15 1/4
30
-----------
17
29
75
19
30
-----------
24 1/2
39
100
19 1/4
40
-----------
23
37
150
21 1/2
40
-----------
28
45
200
23 1/4
46
-----------
29 1/2
48
250
23 1/4
46
-----------
29 1/2
48
300
27
46
-----------
33
53
350
28
53
-----------
33
53
400
31
59
-----------
37
61 1/2
500
32
59
-----------
37
61 1/2
600
32
59
-----------
42
66

Cast Iron

  • Small eyelet wears out quickly
  • No counterweight
  • Bell 16,000 psi tensile strength
  • Breaks in bell cannot be repaired

Steel

  • Extra wear area
  • Heavy steel counterweight
  • 75,000 psi tensile strength
  • Anchor can be repaired by welding

Steel's greater strength permits a
larger bell and thus more holding power.

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