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| Heavy Duty Spider 5" - 26" | Super Duty Spider 26" - 41.5" |
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| Heavy Duty Spider 5" - 26" | Super Duty Spider 26" - 41.5" |
Our quality heavy duty spiders use the finest materials and are built for optimum performance. Custom-made and sized for your tube, utilizing high-tensile steel TIG welded at the hub, giving the vanes extra stability. The threaded stainless steel vane tips (#10-32) are solidly TIG welded to the vanes, making this the strongest spider on the market. Spiders up to 26" feature 0.022" vane thickness, 3/8" center hub and one threaded vane end per vane. Astrosystems spiders and secondary holders are used by virtually all truss telescope manufacturers including Starmaster, Discovery, Obsession, Astrosky, Webster and Osypowski telescopes.
Our super duty spiders offer the same fine materials and construction as the heavy duty spiders. They feature heavier vane material of 0.030", a 1/2" center hub to to match our super duty secondary holders and two vane fasteners per vane. These features allow proper tensioning to hold accurate collimation with even the heaviest secondary mirrors. Our super duty spiders handle the demanding support requirements of short f/ratio telescopes (f/3-f/4.5).
Cardboard tubes may require end rings or internal stiffening with fiberglass to avoid collapsing the tube when properly tensioning the spider. Allow 4-6 weeks fabrication time.
| Size | Tube ID (in.) | ShipWeight | Price (U.S.) | Size | Tube ID (in.) | ShipWeight | Price (U.S.) | |
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| A | 5.0-11 | 2 | $35.00 | D | 16.0-19 | 4 | $46.00 | |
| B | 11.0-13 | 2 | $38.00 | E | 19.0-22 | 5 | $60.00 | |
| C | 13.0-16 | 3 | $44.00 | F | 22.0-26 | 6 | $68.00 |
| Size | Tube ID (in.) | ShipWeight | Price (U.S.) | Size | Tube ID (in.) | ShipWeight | Price (U.S.) | |
|---|---|---|---|---|---|---|---|---|
| G | 26.0-32 | 10 | $110.00 | H | 32.1 - 41.5 | 16 | $130.00 |
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