Evolve Polished Stainless Steel Speargun Shaft
- In stock, ready to ship
- Inventory on the way
Evolve Polished Stainless Steel Speargun Shaft
*** 7 mm (~9/32") in stock, ships immediately! ***
(7.5 mm (~19/64") and 8 mm (~5/16") coming soon)
17-4 PH stainless steel, heat treated and polished to a mirror finish over the full length, then passivated. Four welded sharkfin tabs, Euro notch, single flopper.
Diameter: 7mm / 7.5mm / 8mm
Length: 120cm-170cm (shaft length = gun length + 40 cm).
Specifications
| 7 mm (~9/32") | 7.5 mm (~19/64") | 8 mm (~5/16") | |
|---|---|---|---|
| Availability | Shipping now | Coming soon | Coming soon |
| Price | From $99.99 | To be announced | To be announced |
| Lengths | 120, 130, 140, 150, 160, 170 cm (47", 51", 55", 59", 63", 67") | 120–170 cm (47"–67") | 120–170 cm (47"–67") |
| Weight | 360–510 g (12.7–18.0 oz) | 415–585 g (14.6–20.6 oz) | 470–665 g (16.6–23.5 oz) |
| Material | 17-4 PH precipitation-hardening stainless steel | ||
| Heat treatment | H900, hardness up to HRC 46 | ||
| Finish | Mirror polished over the full length, passivated. No plating or coating. | ||
| Loading tabs | Four welded 17-4 sharkfin tabs — three at the tail, one forward | ||
| Notch | Euro (crescent) sear notch, line hole at the tail and in each sharkfin tab | ||
| Flopper | Single, pin-pressed, engraved | Single, 7mm, 7.5mm flopper | Single, 8.0mm flopper |
| Point | Qucik-entry pencil point | ||
| Fits | Euro-mechanism spearguns, open or closed muzzle | ||
| Origin | Designed in Hawai'i. Made in Taiwan. | ||
Why polished
Most shafts are ground, or ground and plated. This one is polished to a mirror and passivated. On stainless steel a smoother surface resists pitting better: there are fewer grooves for salt to sit in and the passive layer is stronger. It rinses clean, there is no plating to wear through at the tabs or the muzzle, it runs smoother through the muzzle and the track, and a bend shows in the reflection before it shows in the shot.
Using the tabs
Two-band guns load on the rear two tabs; three-band guns on the rear three. The forward tab is a shorter, lower-power position for close reef shots, and a first stage when loading a long roller band before moving the wishbone back to the tail. One band loads on one tab.
Sizing
| Gun length | 80 · 90 · 100 · 110 · 120 · 130 cm 31" · 35" · 39" · 43" · 47" · 51" |
|---|---|
| Shaft | 120 · 130 · 140 · 150 · 160 · 170 cm 47" · 51" · 55" · 59" · 63" · 67" |