Saraswati Manufacturing Works makes high quality lead screws by rolling through precision dies.They are used in our positioning equipment. You can also buy the lead screws alone.
Pitch
|
Diameter
| ||
Turns per inch
|
English Thread Lead Screws
| ||
0.25"
|
0.375"
|
0.50"
| |
2.5 *
|
no
|
yes
|
yes
|
5 *
|
no
|
yes
|
yes
|
10
|
no
|
yes
|
yes
|
20
|
yes
|
yes
|
yes
|
40
|
yes
|
yes
|
yes
|
Maximum length available
|
3 ft.
|
8 ft.
|
8 ft.
|
Turns per centimeter
|
Metric Thread Lead Screws
| ||
7 mm
|
10 mm
|
14 mm
| |
5
|
yes
|
yes
|
yes
|
10
|
yes
|
yes
|
yes
|
Maximum length available
|
3 ft.
|
8 ft.
|
8 ft.
|
And we can combine left and right hand threads on a single shaft for together + apart motion.Our lead screws Manufacturers are 303 stainless steel, except the 5 and 10 pitch (Code: W1, W2 and P5, P10) lead screws which are electroles nickel plated, cold rolled steel.]]
Characteristics Of Lead Screws- A lead screw nut and screw mate with rubbing surfaces, and consequently they have a relatively high friction and stiction compared to mechanical parts which mate with rolling surfaces and bearings.
- Leadscrew efficiency is typically between 25 and 70%, with higher pitch screws tending to be more efficient.
- The high internal friction means that lead screw systems are not usually capable of continuous operation at high speed, as they will overheat.
- Lead screws are typically used well greased, but, with an appropriate nut, they may be run dry with somewhat higher friction. There is often a choice of nuts, and manufacturers will specify screw and nut combination as a set.
The mechanical advantage of a lead screw is determined by the screw pitch and lead. - A lead screw will back drive, whereby forces on the nut applied parallel with the lead screw will cause a free-moving leadscrew to begin to rotate.
Advantages
- Large load carrying capability
- Compact
- Simple to design
- Easy to manufacture; no specialized machinery is required
- Large mechanical advantage
- Precise and accurate linear motion
- Smooth, quiet, and low maintenance
- Minimal number of parts
Disadvantages
- Due to the low efficiency they cannot be used in continuous power transmission applications.
- They also have a high degree for friction on the threads, which can wear the threads out quickly.
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