Helicoid Conveyor Flighting & Screws
Helicoid Conveyor Screws are precision cold-rolled from a specific grade of steel alloy into a continuous smooth finished and hardened helix. Our selection of helicoid lighting utilizes proven manufacturing processes and superb material selection to ensure a long and effective working life. Morse specifically, the design of helicoid conveyor screws is a very cost-effective solution for bulk material handling.These conveyor screws are designated by a few key factors:
- Helicoid Screw Diameter
- Screw Conveyor Configuration / Type
- Right or Left Hand Configuration
- Pitch
- Thickness

When it comes to selecting the right screw for a new screw conveyor system we recommend that you review our screw conveyor engineering data page to ensure proper sizing and output needs. The screws are available as either right-hand or left-hand screws, right-hand screws will be supplied if left is not specified. When possible, it's best to use the standard length of the screw per the diameter required. The carrying side of the flights that do the actual conveying are free of lugs to ensure no material drag or hanging, the back end (also referred to as the non-carrying end) is reinforced at the ends to guard against the flight folding back. Refer to the drawings below for a better understanding of right and left-hand configurations.

Helicoid Flighting Screw Size Chart
Note that there are right-hand (right) and left-hand (left) screw types.
| Right Std. Length Screws | Left Std. Length Screws | Screw Dia. | Length | Section Weight (LBS) | Right Std. Length Flighting Only | Left Std. Length Flighting Only | Section Weight (LBS) | Thickness of Flight Next to Pipe (B) | Thickness of Flight Outer Edge (C) | Nominal Pipe I.D. | Pipe O.D. | Coupling Diameter (A) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4H204-101-0214 | 4H204-111-0212 | 4" | 9' 10.5" | 31 | 4H204-120-0146 | 4H204-125-0141 | 9.0 | 1/8" | 1/16" | 1-1/4" | 1-5/8" | 1" |
| 4H206-101-0354 | 4H206-111-0352 | 4" |
9' 10.5" |
38 | 4H206-120-0211 | 4H206-125-0216 | 16.0 | 3/16" | 3/32" | 1-1/4" |
1- 5/8" |
1" |
| 6H304-101-0420 | 6H304-111-0428 | 6" |
9' 10" |
50 | 6H304-120-0286 | 6H304-125-0281 | 14.0 | 1/8" | 1/16" | 2" | 2-3/8" | 1-1/2" |
| 6H-308-101-0495 | 6H-308-111-0493 | 6" |
9' 10" |
64 | 6H308-120-0351 | 6H308-125-0356 | 28.0 | 1/4" | 1/8" | 2" | 2-3/8" | 1-1/2" |
| 6H312-101-0560 | 6H312-111-0568 | 6" |
9' 10" |
78 | 6H312-120-0427 | 6H312-125-0422 | 42.0 | 3/8" | 3/16" | 2" |
2-3/8" |
1-1/2" |
| 9H306-101-0636 | 9H306-111-0634 | 9" |
9' 10" |
70 | 9H306-120-0567 | 9H306-125-0497 | 31.0 | 3/16" | 3/32" | 2" |
2-3/8" |
1-1/2" |
| 9H312-101-0701 | 9H312-111-0709 | 9" |
9' 10" |
101 | 9H312-120-0633 | 9H312-125-0562 | 62.0 | 3/8" | 3/16" | 2" |
2-3/8" |
1-1/2" |
| 9H406-101-0776 | 9H406-111-0774 | 9" |
9' 10" |
91 | 9H406-120-0708 | 9H406-125-0638 | 30.0 | 3/16" | 3/32" | 2-1/2" | 2-7/8" | 2 |
| 9H412-101-0842 | 9H412-111-0840 | 9" |
9' 10" |
121 | 9H412-120-0773 | 9H412-125-0703 | 60.0 | 3/8" | 3/16" | 2-1/2" | 2-7/8" | 2 |
| 9H414-101-0917 | 9H414-111-0915 | 9" |
9' 10" |
131 | 9H414-120-0849 | 9H414-125-0778 | 70 | 7/16" | 7/32" | 2-1/2" | 2-7/8" | 2 |
| 10H306-101-0982 | 10H306-111-0980 | 10" |
9' 10" |
81 | 10H306-120-0914 | 10H306-125-0844 | 42.0 | 3/16" | 3/32" | 2" | 2-3/8" | 1-1/2" |
| 10H412-101-1055 | 10H412-111-1053 | 10" |
9' 10" |
130 | 10H412-120-0989 | 10H412-125-09119 | 69.0 | 3/8" | 3/16" | 2-1/2" | 2-7/8" | 2" |
| 12H408-101-1121 | 12H408-111-1129 | 12" |
11' 10" |
140 | 12H408-120-1052 | 12H408-125-0984 | 67.0 | 1/4" | 1/8" | 2-1/2" | 2-7/8" | 2" |
| 12H412-101-1196 | 12H412-111-1194 | 12" |
11' 10" |
175 | 12H412-120-1128 | 12H412-125-1057 | 102.0 | 3/8" | 3/16" | 2-1/2" | 2-7/8" | 2" |
| 12H508-101-1261 | 12H508-111-1269 | 12" | 11'9" | 168 | 12H508H-120-1193 | 12H508-125-1123 | 64.0 | 1/4" | 1/8" | 3" | 3-1/2" | 2-7/16" |
| 12H512-101-1337 | 12H512-111-1335 | 12" |
11' 9" |
200 | 12H512-120-1268 | 12H512-125-1198 | 96.0 | 3/8" | 3/16" | 3" | 3-1/2" | 2-7/16" |
| 12H614-101-1402 | 12H614-111-1400 | 12" |
11' 9" |
216 | 12H614-120-1334 | 12H614-125-1263 | 112.0 | 7/16" | 7/32" | 3-1/2" | 4" | 3" |
| 14H508-101-1477 | 14H508-111-1475 | 14" |
11' 9" |
170 | 14H508-120-1409 | 14H508-125-1339 | 84.0 | 1/4" | 1/8" | 3" | 3-1/2" | 2-7/16" |
| 14H614101-1543 | 14H614-111-1541 | 14" |
11' 9" |
236 | 14H614-120-1474 | 14H614-125-1404 | 132.0 | 7/16" | 7/32" | 3-1/2" | 4" | 3" |
| 16H610-101-1618 | 16H610-111-1616 | 16" |
11' 9" |
228 | 16H610-120-1540 | 16H610-125-1479 | 120.0 | 5/16" | 5/32" | 3-1/2" | 4" | 3" |
| 16H614-101-1758 | 16H614-111-1756 | 16" |
11' 9" |
267 | 16H614-120-1680 | 16H614-125-1610 | 163.0 | 7/16" | 7/32" | 4" | 4-1/2" | 3" |
| 18H610-101-1899 | 18H610-111-1897 | 18" |
11' 9" |
292 | 18H610-120-1755 | 18H610-125-1685 | 144.0 | 5/16" | 5/32" | 4" | 4-1/2" | 3" |
| 20H610-101-1949 | 20H610-111-1947 | 20" | 11' 9" |
298 | 20H610-120-1854 | 20H610-125-1701 | 150.0 | 5/16" | 5/32" | 4" | 4-1/2" | 3" |
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