| |
|
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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