Lead Screw Dimensions Table
DINGS’ Motion USA offers precision lead screw options in a range of standard diameters, lead codes, major diameters, and minor diameters for compact linear motion applications. This table helps engineers compare lead screw dimensions, thread availability, and efficiency values when selecting the right screw for speed, resolution, and load requirements.
Use the table to identify the appropriate diameter code and lead code for your linear actuator or custom lead screw assembly. Left-hand thread availability is noted where applicable.
Note: Scroll horizontally to view the full table on mobile.
| Standard Diameter Imperial / Metric |
Diameter Code |
Lead Imperial / Metric |
Lead Code |
Major Diameter Imperial / Metric Reference |
Minor Diameter Imperial / Metric Reference |
Left-Hand Thread |
Efficiency % |
|---|---|---|---|---|---|---|---|
| 0.098 in / 2.50 mm | 009 | 0.0394 in / 1.0000 mm | AB | 0.0976 in / 2.48 mm | 0.0780 in / 1.98 mm | ** | 55 |
| 9/64 in / 3.50 mm | 014 | 0.0118 in / 0.3000 mm | AF | 0.1370 in / 3.48 mm | 0.1213 in / 3.08 mm | ** | 24 |
| 0.0204 in / 0.6096 mm | AA | 0.1358 in / 3.45 mm | 0.1020 in / 2.59 mm | ** | 40 | ||
| 0.0394 in / 1.0000 mm | AB | 0.1283 in / 3.26 mm | 0.0780 in / 1.98 mm | ** | 58 | ||
| 0.0480 in / 1.2192 mm | B | 0.1366 in / 3.47 mm | 0.0878 in / 2.23 mm | ** | 61 | ||
| 0.0787 in / 2.0000 mm | G | 0.1370 in / 3.48 mm | 0.0874 in / 2.22 mm | yes | 72 | ||
| 0.1575 in / 4.0000 mm | M | 0.1366 in / 3.47 mm | 0.0961 in / 2.44 mm | ** | 79 | ||
| 0.3150 in / 8.0000 mm | T | 0.1366 in / 3.47 mm | 0.1000 in / 2.54 mm | ** | 81 | ||
| 3/16 in / 4.77 mm | 018 | 0.0125 in / 0.3175 mm | O | 0.1882 in / 4.78 mm | 0.1661 in / 4.22 mm | ** | 21 |
| 0.0250 in / 0.6350 mm | A | 0.1874 in / 4.76 mm | 0.1457 in / 3.70 mm | ** | 33 | ||
| 0.0500 in / 1.2700 mm | D | 0.1882 in / 4.78 mm | 0.1374 in / 3.49 mm | yes | 58 | ||
| 0.0625 in / 1.5875 mm | F | 0.1878 in / 4.77 mm | 0.1563 in / 3.97 mm | ** | 60 | ||
| 0.1000 in / 2.5400 mm | K | 0.1882 in / 4.78 mm | 0.1193 in / 3.03 mm | ** | 69 | ||
| 0.1920 in / 4.8768 mm | Q | 0.1878 in / 4.77 mm | 0.1378 in / 3.50 mm | ** | 79 | ||
| 0.2000 in / 5.0800 mm | R | 0.1874 in / 4.76 mm | 0.1366 in / 3.47 mm | ** | 80 | ||
| 0.4000 in / 10.1600 mm | X | 0.1874 in / 4.76 mm | 0.1441 in / 3.66 mm | ** | 82 | ||
| 1/4 in / 6.35 mm | 025 | 0.0240 in / 0.6096 mm | AA | 0.2492 in / 6.33 mm | 0.2157 in / 5.48 mm | ** | 26 |
| 0.0250 in / 0.6350 mm | A | 0.2500 in / 6.35 mm | 0.2150 in / 5.46 mm | ** | 27 | ||
| 0.0313 in / 0.7940 mm | N | 0.2492 in / 6.33 mm | 0.2106 in / 5.35 mm | ** | 32 | ||
| 0.0394 in / 1.0000 mm | AB | 0.2500 in / 6.35 mm | 0.1945 in / 4.94 mm | ** | 37 | ||
| 0.0480 in / 1.2192 mm | B | 0.2492 in / 6.33 mm | 0.1878 in / 4.77 mm | ** | 45 | ||
| 0.0500 in / 1.2700 mm | D | 0.2492 in / 6.33 mm | 0.1894 in / 4.81 mm | ** | 46 | ||
| 0.0625 in / 1.5875 mm | F | 0.2469 in / 6.27 mm | 0.1894 in / 4.81 mm | yes | 46 | ||
| 0.0960 in / 2.4384 mm | J | 0.2496 in / 6.34 mm | 0.1886 in / 4.79 mm | ** | 61 | ||
| 0.1000 in / 2.5400 mm | K | 0.2488 in / 6.32 mm | 0.1886 in / 4.79 mm | yes | 62 | ||
| 0.1250 in / 3.1750 mm | L | 0.2488 in / 6.32 mm | 0.1669 in / 4.24 mm | ** | 67 | ||
| 0.1920 in / 4.8768 mm | Q | 0.2492 in / 6.33 mm | 0.1791 in / 4.55 mm | ** | 76 | ||
| 0.2000 in / 5.0800 mm | R | 0.2496 in / 6.34 mm | 0.1870 in / 4.75 mm | ** | 76 | ||
| 0.2500 in / 6.3500 mm | S | 0.2488 in / 6.32 mm | 0.1890 in / 4.80 mm | ** | 77 | ||
| 0.3333 in / 8.4667 mm | U | 0.2492 in / 6.33 mm | 0.1886 in / 4.79 mm | ** | 78 | ||
| 0.3840 in / 9.7536 mm | W | 0.2492 in / 6.33 mm | 0.1992 in / 5.06 mm | ** | 78 | ||
| 0.5000 in / 12.7000 mm | Y | 0.2480 in / 6.30 mm | 0.1677 in / 4.26 mm | ** | 82 | ||
Note: Dimensions are provided for lead screw reference and product selection. Left-hand thread availability marked “yes” indicates standard availability. “**” indicates consult DINGS' Motion USA for availability.
Notes:
1. Effective stroke / screw length notation: Ex. 55R80 indicates an effective stroke of 55mm and a total screw length of 80 mm.
2. Acronym reference: FB1 = Flanged Single Nut Type 1, FB2 = Flanged Single Nut Type 2, CB = Cylindrical Single Nut, KB = Square Single Nut, MB = Metric Thread Single Nut.
3. Left-Hand thread option available on all C5 grade screws.
4. For rolled C7 ball screws, the shaft-end diameter must not exceed the root diameter of the screw.
5. For lengths exceeding the maximum production limit, please contact our sales engineers.
6. Dynamic and static load ratings are shown by nut type because load capacity varies by nut style for a given screw diameter and lead.