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Choosing the Right Spear Shaft

by neptonics / Wednesday, 31 March 2021 / Published in Spearfishing 101
Blog Shaft 600

Choosing the Right Spear Shaft for You

There are countless options for different spear shafts.  Some options you have control over, like shaft thickness, length, and whether it is a threaded or flopper shaft. Spearguns limit what types of spears need to be used. For example, if you have a Euro speargun you have little choice other than to use a euro notched (rounded) shaft. Conversely American style spearguns require American notched (square) shafts. We will be going over some considerations in the factors we can control in the choice in our spear shafts.  It should be noted that any spear shaft is better than no spear shaft when making a purchase.  

Shaft Thickness

Shaft thickness is usually a consideration based on species and number of bands. 

Thick Spears:

Thicker spear shafts help land larger Bluewater species, especially tough skinned species like Tuna and Marlin.  Thick shafts create more force due to their increased weight compared to thinner spear shafts.  Thicker spear shafts also are less prone to bending under strain. Thicker spear shafts tend to be 8mm for euro spear shafts and 11/32” or eve 3/8” for American spear shafts.  The thicker the spear shaft the heavier it is and the more force it takes to launch it through the water.  Spearguns need to be larger to absorb the force of larger spear shafts.

Thin Spears:

Thinner spear shafts are lighter weight and tend to shoot further and penetrate fish easier.  They are also more prone to getting bent by fish, especially large reef fish pulling them into rocks.  Thinner spear shaft lengths tend to be 6.5mm, 7mm, or 9/32” shafts, although 7.5mm and 5/16” spear shafts are still in the normal range of shafts used under normal reef hunting conditions.  

Spear Length

Speargun length determines spear shaft length. It is important to try to keep the shaft overhang of your spear shaft consistent across all of your spearguns to help keep your point of aim consistent.  Most manufacturers recommend between 9” and 11” of shaft overhang from the end of the speargun to the tip of the spear, whether it is flopper or sliptip.  It is important to consider the length of slip tips as well in the choice and purchase of different spear shafts.  This means that a threaded shaft will need to be shorter than a flopper shaft for the same speargun.  Often times manufactures will have recommended lengths for the specific speargun in various set ups.  

Flopper vs Threads

Deciding between flopper and threaded shafts is based on targeted species. Pelagic or bluewater species often require sliptips.  Flopper shafts tend to work better on reef fish because sliptips tend to give reef fish too much mobility to get into the rocks, which makes retrieval especially difficult.  

Spare Shafts

Keep spare shafts for your spearguns in stock. It is upsetting to be invited out on a dive trip only to realize your only spear shaft is bent. Remember, overnight shipping is extremely expensive.  It is always better to be prepared than to literally pay for a lack of being ready to dive.  

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Neptonics

  • PRODUCTS
    • Spearguns & Polespears
      • Wooden Spearguns
      • Euro Spearguns
      • Roller Spearguns
      • Polespears & Slings
    • Wetsuits
      • Wetsuit Glue & Cleaner
      • Riffe Wetsuits
      • Neptonics Wetsuits
      • Waihana
      • Salvimar Wetsuits
    • Essential Gear
      • Dive Watches
      • Freediving Fins
      • Spearfishing Masks
      • Snorkels
      • Dive Knives
      • Gloves
      • Booties
      • Power Heads
      • Bubba Blade Products
      • Flashlights
      • Anti-Fog Gel
      • Spearshaft Protector
    • Accessories
      • Flashlights
      • GoPro Accessories
      • Bags & Travel Cases
      • Certified Scales
      • Shark Shield
      • Flashers
    • Rigging, Rubber, Shafts
      • Mori Shaft
      • Rob Allen Shafts
      • Neptonics Shafts
      • Custom Shafts
      • Speargun Rubbers
      • Slip-Tips
      • Euro Shafts
      • American Shafts
      • Shooting Line
      • Crimping Kits
      • Muzzle Bungees
      • Tuna Clips, Swivels, Tackle
    • Apparel
      • T-Shirts
      • Hats
      • Spearfishing Stickers
    • Floats, Floatlines, Reels
      • Floatlines
      • Tuna Bungees
      • Floats
      • Reels & Accessories
    • Weight Belts
      • Weight Belts
      • Lead Weights
      • Weight Belt Accessories
      • Carter Floats
    • Speargun Builder
      • Speargun Triggers
      • Speargun Handles
      • Enclosed Speargun Tracks
      • Roller Gun Parts
      • Speargun Components
      • Speargun Building Tools
    • Lobster Gear
      • Lobster Gauges
      • Lobster Bags
      • Pry Bar
      • Lobster Snare
  • ACADEMY
  • ABOUT
    • LOCATIONS
    • CONTACT
  • ACCOUNT
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Spearfishing Rubber & Powerbands
Speargun Parts
Spearguns and Polespears
Spearfishing Weight Belts, Dive Lights & Knives