the basics of how a lever action works.pdf

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Gunsmithing Sticky's The Basics Of How A Lever Action Works

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03-14-2010, 09:29 PM

The Basics Of How A Lever Action Works

NOTE: 3/20 - Original post updated to include a thirdpicture and better describe the lever/carrier function.

Aside from the finger and trigger slots and overall shape, thelever has six key points:

This image has been resized. Click this bar to view the full image. The original image is sized 800x437.

1. While not critical to action function, the plunger andplunger spring are what lock the lever to the gun and keep itfrom just popping open.

2. This hook engages the locking lug and moves it up and

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The Basics Of How A Lever Action Works http://www.marlinowners.com/forum/gunsmithing-sticky-s/46737-basics...

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down.

3. This ramp rides on the carrier (aka lifter) and justinitiates enough movement of the carrier to block the nextround from entering the receiver after a new one isdelivered.

4. This "nub" sits inside the groove in the bolt and forces thebolt backward. The bolt rides along the face (right side aspictured) of this curve.

5. This "point" pushes the bolt forward and locks it intobattery.

6. This "cut-out" both allows the carrier to slide alongsidethe lever and holds the next round as it moves from themagazine to the chamber. The left as pictured end of thiscutout engages the carrier and this is what moves the carrierup and down during cycling.

Here is a picture of the parts more or less as they sit whenin battery:


The lever is closed and up against the rifle. The bolt isforward and the locking lug is engaged in the bolt, this iswhat keeps the bolt from flying out the back of the rifle. Thecarrier is down and ready to pick up a new round.

Here is a picture of the parts more or less being cycled:



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And here is a picture attempting to show the key points inthe function of the lever and the carrier. This obviously is nothow they sit in the rifle. Read below for description.


The lever throws open. The locking lug drops, allowing thebolt to move rearward and the lever disengages it. The boltvia the extractor pulls the empty casing out of the chamberand when it reaches the ejector spring it is tossed out theejection port. The lever slides along the hook on the carrier


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depressing it (it's sprung) until the lever is fully forward andthe bevel section slips just passed the hook on the carrier,allowing it to pop out and the lever to engage it. As the leveris moved back (to the rifle) the carrier raises and delivers anew round for the bolt to pick up and deliver to the chamber.

The lever/carrier function is tough to explain and show in apicture. If you cycle your lever with a good light and watchinside the ejection port you can see the lever slip over thehook on the carrier and engage it. You can also feel and hearit click just at the very end of the cycle when the lever isfully extended. And as soon as you pull back on the lever,the carrier will lift.

It might seem complicated to read about but it is amazinglysimple in design.

Hopes this helps folks in understanding what is going oninside the receiver. It is really an extremely simple systembut it does require the right angles, radii, and timing.

Last edited by Eli Chaps; 12-28-2012 at 07:36 AM.

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