HelioTrak Sundial Parts &
Accessories
This is the page for ordering HelioTrak sundial 3D-printed parts, accessories, and ready-to-use sundials. I keep a low inventory, so I may be out of stock when you order. In that case, you can either wait for more inventory or I'll issue a refund.
This is a low-volume, low-profit business. I don't have a fancy e-commerce web site. I'm just one person hand-building sundials and filling orders myself to encourage science education. If you want parts in larger quantities, you can save money by buying them elsewhere.
These are homemade 3D-printed products. Expect minor defects like bumpy surfaces. The sticker sheet is not scored or perforated -- you must cut the shapes manually with scissors. The compass could be off by a few degrees, but you can calibrate it as described in the HelioTrak download & assembly page.
Item #1: Sundial accessory parts only (no 3D-printed parts), $10. This kit includes the compass, bubble level, nylon hex nut, and stick-on analemmas and hour numbers. Use this kit if you 3D-print your own main parts.
Item #2: Set of 3D-printed parts and accessories, $25. Everything you need to assemble a sundial except for epoxy glue. Assembly instructions are on the HelioTrak download & assembly page. Part colors may differ somewhat from those shown in the photo.
Item #3: Fully assembled sundial, $45. Same as Item #2 but ready to use, all glued and stickered, plus a sheet of spare stickers. Part colors may differ somewhat from those shown in the photo.
Item #4: Optional removable handle extender, which allows tripod mounting with full swing of the solar tracking cage. $5 if purchased with other items or $8 alone.
To order, go to PayPal.com and send the appropriate dollar amount to Gray Chang at this email address:
Be sure to tell me in the "add a note" section:
- The items you want
- The quantity of each item
- The delivery address (U.S. only)
If you haven't used PayPal before, you'll need to create an account, which takes a few minutes. The payment comes from your credit card or bank account.