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How to properly straigth a bend shaft
- Thread starter seaman
- Start date
Thread Status: Hello
, There was no answer in this thread for more than 90 days.
It can take a long time to get an up-to-date response or contact with relevant users.
It can take a long time to get an up-to-date response or contact with relevant users.
Take the bent shaft and grip it firmly with both hands, then place it in the center of a trash can, and cover with the can's lid. Next, drive to your LDS, pull out your credit card, and say, "I need a replacement shaft for my [gun brand/model/size] because I shot a world record [name of popular local fish species] but it got away".
Hope this helps!
Jim
Hope this helps!
Jim
Seaman, I guess it depends on the severity of the bend, the type of spear, thickness, material ect.
I use (mainly) 6.5mm s/s spears & straighten them regularly, simply by reshaping the shaft over my knee!
I use (mainly) 6.5mm s/s spears & straighten them regularly, simply by reshaping the shaft over my knee!
I roll the shaft over my work bench to find the bends and then use a vise to straight it as much as possible. I cover the jaws of the vise with two pieces of hard board to avoid scaring the shaft. The final touch is a whack over the anvil with a heavy rubber mallet. If you use a hammer you have to sand the shaft very carefully afterward to make sure it is smooth and the slide spring doesnt get snagged half way when you shoot. You will have fewer bend shafts if you switch to slip tips.
Last edited:
jimdoe2you said:Take the bent shaft and grip it firmly with both hands, then place it in the center of a trash can, and cover with the can's lid. Next, drive to your LDS, pull out your credit card, and say, "I need a replacement shaft for my [gun brand/model/size] because I shot a world record [name of popular local fish species] but it got away".
Hope this helps!
Jim
rofl rofl rofl
Try going back to your original post and click on "edit", on the bottom right corner, next to "Quote". When you are done with the changes, click on "save". That's it. But dont worry too much about typos or grammatical mistakes. We are a cool and understanding community.
All the above methods are good for removing the major bends. To get the shaft perfectly straight you can use an arrow shaft straightener (picture attached). You put your wobbly shaft on the roller-supported span, drop the deflection gauge prong down, spin the shaft and use the gauge to measure high points. You then use bend-bar near the gauge to press down the shaft in the opposite direction.
With a bit of practice you should be able to get the shaft within 0.002" straightness. You can also just free-spin the shaft on the rollers and see whether any of your other shafts are perfectly straight.
You should be able to buy one of these devices from any archery shop. Beware that some of the cheaper models are made of plastic and are intended for correcting thin-walled aluminum tubing - these models may not be strong enough for solid steel shafts. The model in picture is made by Vador and is of all-steel construction.
Good luck.
Gary
With a bit of practice you should be able to get the shaft within 0.002" straightness. You can also just free-spin the shaft on the rollers and see whether any of your other shafts are perfectly straight.
You should be able to buy one of these devices from any archery shop. Beware that some of the cheaper models are made of plastic and are intended for correcting thin-walled aluminum tubing - these models may not be strong enough for solid steel shafts. The model in picture is made by Vador and is of all-steel construction.
Good luck.
Gary
Attachments
I found this home-made tool in pescasub.com. It basically consist of three rollers installed on the jaws of a vise. The instructions are in spanish. Check it out.
http://www.pescasub.com/modules.php?name=Forums&file=viewtopic&t=572
http://www.pescasub.com/modules.php?name=Forums&file=viewtopic&t=572
The best way to see a bend in a shaft is to use the human eye.
You need to hang a perfectly straight edge down and put the shaft next to it.
slowly rotate the shaft until you can see daylight.
This is best accomplished in a doorway of a darkened room looking out into daylight
This method is the most accurate but the hardest to setup.
Arrow straighteners are fine for arrows but shafts are usually much longer and unless supported evenly over the entire length of the shaft will cause the shaft to bow upwards in the middle causing an incorrect deflection.
You need to hang a perfectly straight edge down and put the shaft next to it.
slowly rotate the shaft until you can see daylight.
This is best accomplished in a doorway of a darkened room looking out into daylight
This method is the most accurate but the hardest to setup.
Arrow straighteners are fine for arrows but shafts are usually much longer and unless supported evenly over the entire length of the shaft will cause the shaft to bow upwards in the middle causing an incorrect deflection.
There was a Hawaiian skin diver magazine that Steve Alexander went into great detail in how to get a shaft straight. The magazine was the one with Tanya Streeter in the cover edition fall 2003. You may want to check it out in addition to all information we've got in this thread.