AstroSystems Spiders

Heavy Duty Spider 5" - 15" Super Duty Spider 15" - 26" Super Duty II  26" to 40"

Heavy Duty Spiders - Style 1

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.  Style 1 Spiders can be made up to 15" and feature 0.022" vane thickness, 3/8" center hub and one threaded vane end per vane.  Style 2 Spiders can be made up to 22" and feature 0.029" vane thickness, 3/8" center hub and one threaded vane end per vane.  Astrosystems spiders and secondary holders are used by most truss telescope manufacturers including Starmaster, Discovery, Parallax, Planewave, Obsession, Astrosky, Webster and Osypowski telescopes.

Super Duty Spiders - Style 2 and 3

Our Super Duty spiders offer the same fine materials and construction as the heavy duty spiders.  They feature heavier vane material of 0.059", 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).

Super Duty II Spiders - Style 4

Our Super Duty II spiders offer the same fine materials and construction as the heavy duty spiders.  The Style 4 features heavier vane material of 0.048", a 1/2" center hub to to match our Super Duty secondary holders and two #10-32 stainless vane fasteners per vane.  These features allow proper tensioning to hold accurate collimation with even the heaviest secondary mirrors.  Our super duty II spiders handle the demanding support requirements of short f/ratio telescopes (f/3-f/4.5) and large, heavy secondary mirrors/holders.

Super Duty II Spiders - Style 5

Our Super Duty II spiders offer the same fine materials and construction as the heavy duty spiders.  The Style 5 features heavier vane material of  0.048", a 1/2" center hub to to match our Super Duty secondary holders and two 1/4-20 stainless vane fasteners per vane.  These features allow proper tensioning to hold accurate collimation with even the heaviest secondary mirrors.  Our super duty II spiders handle the demanding support requirements of short f/ratio telescopes (f/3-f/4.5) and large, heavy secondary mirrors/holders.  The adjustment plate is attached to the spider and minimizes torque on the spider from large heavy secondary mirrors.

 

The following tables are for pricing only, spiders are not adjustable.

Style 1

Heavy Duty   Recommended for 1.32 - 2.14" secondary mirrors.  Maximum tube inside diameter is 15", single vane end, 1.5" wide at center.

 

Tube ID (in.) Center Body Length (in.) Vane Thickness Vane Ends Thread Price (U.S.) ShipWeight
5 - 11 1.5 0.022 1 10-32 $36.00 2
11 - 13 1.5 0.022 1 10-32 $39.00 2
13 - 15 1.5 0.022 1 10-32 $44.00 3

Style 2

Heavy Duty   Thicker vanes, wider center body, recommended for 2.5 - 4" secondary mirrors.

Maximum tube inside diameter is 22", single vane end, 2.5" wide at center.

Tube ID (in.)

 Center Body Length (in.) Vane Thickness Vane Ends Thread Price (U.S.) ShipWeight
15 - 19 2.5 0.029 1 10-32 $52.00 3
19 - 22 2.5 0.029 1 10-32 $60.00 3

Style 3

Heavy Duty   Double vane ends, recommended for 2.5 - 4.5" secondary mirrors.

Maximum tube inside diameter is 26", double vane end spaced 1" apart, 2.5" wide at center.

Tube ID (in.)

 Center Body Length (in.) Vane Thickness Vane Ends Thread Price (U.S.) ShipWeight
15 - 19 2.5 0.029 2 10-32 $70.00 3
19 - 22 2.5 0.029 2 10-32 $78.00 3
22 - 26 2.5 0.029 2 10-32 $86.00 5

Style 4

Super Duty   Thicker Vanes, double vane ends, recommended for 4.25 - 6" secondary mirrors.

Maximum tube inside diameter is 37", double vane end spaced 1" apart, 3.0" wide at center.

 

Tube ID (in.)

 Center Body Length (in.) Vane Thickness Vane Ends Vane end spacing Thread Price (U.S.) ShipWeight
26 - 37 3.0 0.048 2 1" 10-32 $150.00 8

 

Style 5

Super Duty II  Wider center body, double vane ends -  larger 1/4-20 size, recommended for 5 - 6.5" secondary mirrors and shorter f/ratio (f/4 or less).

Maximum tube inside diameter is 40", double vane end spaced 2.5" apart, 4.0" wide at center.  Has an integrated adjustment plate for the secondary holder that stiffens the spider, resisting torque from heavy secondary mirrors.

Tube ID (in.)

 Center Body Length (in.) Vane Thickness Vane Ends Vane End Spacing Thread Price (U.S.) ShipWeight
26 - 40 4.0 0.048 2 2.5" 1/4-20 $190.00 10

 

Dimensions and sizing of spider (click here)

 

Installation Instructions (pdf)

 

To Order state:

Tube ID - to size the spider

Tube thickness - to supply proper length stainless steel mounting screws.

 

Allow 1-2 weeks fabrication time.

 

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