| |
|
Groove
Radius |
Groove
Radius
|
Groove
Radius
|
Groove
Radius |
Nominal
Rope
Diameter |
Nominal
Rope
Diameter |
New |
New |
Worn |
Worn |
1
inches |
2
mm |
3
inches |
4
mm |
5
inches |
6
mm |
| 1/4 |
6.4 |
.135 |
3.43 |
.129 |
3.28 |
| 5/16 |
8.0 |
.167 |
4.24 |
.160 |
4.06 |
| 3/8 |
9.5 |
.201 |
5.11 |
.190 |
4.83 |
| 7/16 |
11 |
.234 |
5.94 |
.220 |
5.59 |
| 1/2 |
13 |
.271 |
6.88 |
.256 |
6.50 |
| 9/16 |
14.5 |
.303 |
7.70 |
.288 |
7.32 |
| 5/8 |
16 |
.334 |
8.48 |
.320 |
8.13 |
| 3/4 |
19 |
.401 |
10.19 |
.380 |
9.65 |
| 7/8 |
22 |
.468 |
11.89 |
.440 |
11.18 |
| 1 |
26 |
.543 |
13.79 |
.513 |
13.03 |
| 1-1/8 |
29 |
.605 |
15.37 |
.577 |
14.66 |
| 1-1/4 |
32 |
.669 |
16.99 |
.639 |
16.23 |
| 1-3/8 |
35 |
.736 |
18.69 |
.699 |
17.75 |
| 1-1/2 |
38 |
.803 |
20.40 |
.759 |
19.28 |
| 1-5/8 |
42 |
.876 |
22.25 |
.833 |
21.16 |
| 1-3/4 |
45 |
.939 |
23.85 |
.897 |
22.78 |
| 1-7/8 |
48 |
1.003 |
25.48 |
.959 |
24.36 |
| 2 |
52 |
1.085 |
27.56 |
1.025 |
26.04 |
| 2-1/8 |
54 |
1.137 |
28.88 |
1.079 |
27.41 |
| 2-1/4 |
58 |
1.210 |
30.73 |
1.153 |
29.29 |
| 2-3/8 |
60 |
1.271 |
32.28 |
1.199 |
30.45 |
| 2-1/2 |
64 |
1.338 |
33.99 |
1.279 |
32.49 |
| 2-5/8 |
67 |
1.404 |
35.66 |
1.339 |
34.01 |
| 2-3/4 |
71 |
1.481 |
37.62 |
1.409 |
35.79 |
| 2-7/8 |
74 |
1.544 |
39.22 |
1.473 |
37.41 |
| 3 |
77 |
1.607 |
40.82 |
1.538 |
39.07 |
| 3-1/8 |
80 |
1.664 |
42.27 |
1.598 |
40.59 |
| 3-1/4 |
83 |
1.731 |
43.97 |
1.658 |
42.11 |
| 3-3/8 |
87 |
1.807 |
45.90 |
1.730 |
43.94 |
| 3-1/2 |
90 |
1.869 |
47.47 |
1.794 |
45.57 |
| 3-3/4 |
96 |
1.997 |
50.72 |
1.918 |
48.72 |
| 4 |
103 |
2.139 |
54.33 |
2.050 |
52.07 |
| 4-1/4 |
109 |
2.264 |
57.51 |
2.178 |
55.32 |
| 4-1/2 |
115 |
2.396 |
60.86 |
2.298 |
58.37 |
| 4-3/4 |
122 |
2.534 |
64.36 |
2.434 |
61.82 |
| 5 |
128 |
2.663 |
67.64 |
2.557 |
64.95 |
| 5-1/4 |
135 |
2.804 |
71.22 |
2.691 |
68.35 |
| 5-1/2 |
141 |
2.929 |
74.40 |
2.817 |
71.55 |
| 5-3/4 |
148 |
3.074 |
78.08 |
2.947 |
74.85 |
| 6 |
154 |
3.198 |
81.23 |
3.075 |
78.11 |
*
Values given are applicable to grooves in sheaves
and drums; they are not generally suitable for pitch
design since this may involve other factors.
Further,
the dimensions do not apply to traction-type elevators;
in this circumstance, drum-and sheave-groove tolerances
should conform to the elevator manufacturer's specifications.
Modern
drum design embraces extensive considerations beyond
the scope of this publication. It should also be noted
that drum grooves are now produced with a number of
oversize dimensions and pitches applicable to certain
service requirements.
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