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Ashland Conveyor Product's gravity roller conveyors are available in many sizes and configurations. There are many factors to consider when selecting a roller conveyor.
The following is intended to aid in the selection process. |
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Roller Conveyor Load Type
Gravity roller conveyor will convey loads that have firm flat bottoms such as cartons, totes, skids, firm bags, drums, etc. |
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Conveyor Roller size
Roller Size is determined by:
Load - in general heavier loads will require larger rollers that meet or exceed the load per roller
Loading conditions - an impact loading condition may require larger and/or heavier gauge tubing |
Conveyor Roller Centers
A minimum of three rollers should be in contact with the load at all times. Roller conveyor centers may need to be reduced even further in order to reduce the load per roller. |
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Conveyor Rollers Set High or Low
Most roller conveyors can be ordered set high or set low. Ashland Conveyor products standard is set high. Rollers set high places the load above the frame allowing the load to overhang. Rollers set low places the rollers below the frame allowing the frame to act as a guard. When specifying set low the between frame dimension should allow for one inch clearance on each side of the largest conveyed item. |
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FRAME CAPACITY |
FRAME STYLE |
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Aluminum Capacity
2-1/2"x1"x1/8"
16 Lbs./Ft. on 10' support centers
120 Lbs./Ft. on 5' support centers
Steel Capacity
2-1/2"x1"x12 ga.
36 Lbs./Ft. on 10' support centers
260 Lbs./Ft. on 5' support Centers |
2-1/2" Channel
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Aluminum Capacity
3-1/2"x1-3/8"x1/8"
45 Lbs./Ft. on 10' support centers
420 Lbs./Ft. on 5' support centers
Steel Capacity
3-1/2"x1-3/8"x11 ga.
120 Lbs./Ft. on 10' support centers
600 Lbs./Ft. on 5' support Centers |
3-1/2" Channel
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Steel Capacity
4"x1-1/2"x7 ga.
230 Lbs./Ft. on 10' support centers
1, 050 Lbs./Ft. on 5' support centers |
4" Channel
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Steel Capacity
4"x5.4 Lbs. structural
300 Lbs./Ft. on 10' support centers
1, 550 Lbs./Ft. on 5' support centers |
4" Structural
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Roller Conveyor Curves
Many times curves will determine the width of the roller conveyor system, as the product requires aditional space to negociate the turn. This additional spave depends upon the length and width of the product. Refer to the following tables and formula.
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2-1/2" Channel Frames (36" IR)
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Product Length |
Product Width |
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4" |
8" |
12" |
16" |
20" |
24" |
28" |
32" |
36" |
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Min. Conveyor Between Frame Dimension |
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4" |
6"
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10"
|
14"
|
18"
|
22"
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26"
|
30"
|
34"
|
38"
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8" |
6"
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10"
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14"
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18"
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22"
|
26"
|
30"
|
34"
|
38"
|
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12" |
6"
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10"
|
14"
|
18"
|
22"
|
26"
|
30"
|
34"
|
38"
|
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16" |
7"
|
11"
|
15"
|
19"
|
23"
|
27"
|
30"
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34"
|
38"
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20" |
7"
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11"
|
15"
|
19"
|
23"
|
27"
|
31"
|
35"
|
39"
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24" |
8"
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12"
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15"
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19"
|
23"
|
27"
|
31"
|
35"
|
39"
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28" |
8"
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12"
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16"
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20"
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24"
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28"
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32"
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35"
|
39"
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32" |
9"
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13"
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17"
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20"
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24"
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28"
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32"
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36"
|
40"
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36" |
10"
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14"
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18"
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21"
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25"
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29"
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32"
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36"
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40"
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3-1/2" Channel Frames (30" IR)
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Product Length |
Product Width |
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4" |
8" |
12" |
16" |
20" |
24" |
28" |
32" |
36" |
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Min. Conveyor Between Frame Dimension |
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4" |
6"
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10"
|
14"
|
18"
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22"
|
26"
|
30"
|
34"
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38"
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8" |
6"
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10"
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14"
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18"
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22"
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26"
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30"
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34"
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38"
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12" |
7"
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10"
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14"
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18"
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22"
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26"
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30"
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34"
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38"
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16" |
7"
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11"
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15"
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19"
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23"
|
27"
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31"
|
35"
|
38"
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20" |
7"
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11"
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15"
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19"
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23"
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27"
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31"
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35"
|
39"
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24" |
8"
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12"
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16"
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20"
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23"
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27"
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31"
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35"
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39"
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28" |
9"
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12"
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16"
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20"
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24"
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28"
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32"
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36"
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39"
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32" |
10"
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13"
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17"
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21"
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24"
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28"
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32"
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36"
|
40"
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36" |
10"
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14"
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18"
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21"
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25"
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29"
|
33"
|
37"
|
40"
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|
40" |
11"
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15"
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19"
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22"
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26"
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30"
|
33"
|
37"
|
41"
|
|
44" |
12"
|
16"
|
19"
|
23"
|
27"
|
30"
|
34"
|
38"
|
42"
|
|
48" |
14"
|
17"
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20"
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24"
|
27"
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31"
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35"
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38"
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42"
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52" |
15" |
18" |
21" |
25" |
28" |
32" |
36" |
39" |
43" |
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4" Channel Frames (32-1/2" IR)
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Product Length |
Product Width |
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4" |
8" |
12" |
16" |
20" |
24" |
28" |
32" |
36" |
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Min. Conveyor Between Frame Dimension |
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4" |
6"
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10"
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14"
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18"
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22"
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26"
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30"
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34"
|
38"
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8" |
6"
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10"
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14"
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18"
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22"
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26"
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30"
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34"
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38"
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12" |
6"
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10"
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14"
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18"
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22"
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26"
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30"
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34"
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38"
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16" |
7"
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11"
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15"
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19"
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23"
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27"
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31"
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34"
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38"
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20" |
7"
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11"
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15"
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19"
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23"
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27"
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31"
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35"
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39"
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24" |
8"
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12"
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16"
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19"
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23"
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27"
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31"
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35"
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39"
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28" |
9"
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12"
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16"
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20"
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24"
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28"
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32"
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36"
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39"
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32" |
9"
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13"
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17"
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21"
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24"
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28"
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32"
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36"
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40"
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36" |
10"
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14"
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18"
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21"
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25"
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29"
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33"
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36"
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40"
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40" |
11"
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15"
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19"
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22"
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26"
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29"
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33"
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37"
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41"
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44" |
12"
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16"
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19"
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23"
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26"
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30"
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34"
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38"
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41"
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48" |
13"
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17"
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20"
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24"
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27"
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31"
|
35"
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38"
|
42"
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52" |
14" |
18" |
21" |
25" |
28" |
32" |
35" |
39" |
43" |
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Roller Conveyor Frame Capacity
The frame must be capable of supporting both the conveyed items and the frame and rollers. The conveyor frame capacities provided are based upon 5 foot and 10 foot support centers. Applications that exceed capacities may require additional supports or a heavier frame. |
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Roller Conveyor Slope
As a general guide refer to the following table when determining slope. Conveying a heavier, firm surface will require less slope than a lighter, softer surface. Some applications may require brake rollers to retard the speed of conveyed items. A field test should always be performed to determine proper slope. |
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Item |
Weight |
Slope Required To Start And Move Product |
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Inches/Foot |
Inches/10' |
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Firm Cartons |
5 |
7/8" |
9" |
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10 |
3/4" |
7-1/2" |
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50 |
1/2" |
5" |
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100 |
3/8" |
3-3/4" |
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Steel Drums |
150 |
3/8" |
3-3/4" |
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300 |
1/4" |
2-1/2" |
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Tote |
10 |
1/2" |
5" |
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25 |
3/8" |
3-3/4" |
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50 |
5/16" |
3-1/8" |
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100 |
1/4" |
2-1/2" |
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Pallet With Runners |
50 |
1/2" |
5" |
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100 |
7/16" |
4-3/8" |
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250 |
3/8" |
3-3/4" |
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500 |
5/16" |
3-1/8" |
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Roller Conveyor Supports
Both the weight of the conveyed items and the conveyor must be considered when selecting supports. The nominal height of the support is to the bottom of the conveyor frame. For hook and rod conveyor either H-stand supports or tripods may be selected. Ceiling hanger supports are also available. |
