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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Machinist Mondays with Defiance
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<blockquote data-quote="DefianceMachine" data-source="post: 2599290" data-attributes="member: 117946"><div style="text-align: center">[h2]Legacy Bolt Process[/h2]</div><p></p><p>[ATTACH=full]387549[/ATTACH]</p><p></p><p>The bolts found on our Deviant and Rebel actions are manufactured differently than the bolts in the rest of our product line as they are machined with a full-length handle.</p><p></p><p>Manufacturing a one-piece bolt of this style is a bit of an adventure.</p><p> </p><p>We start with a rectangular block of hardened steel from which we will get two bolts.</p><p></p><p>There is a deep hole through the center for the firing pin that needs to be concentric to the outside diameter. Drilling deep holes straight is always a little challenging, not to mention in pre-hardened 4340.</p><p></p><p>The handle is also a lathe-turned feature, but it is not perpendicular or centered to the body.</p><p></p><p>There are always multiple ways a part can be made, and at the end of the day we come up with a process that efficiently creates the best product possible. This part has a significant number of operations including a 3-axis mill, waterjet, 5-axis mill, mill-turn center, another 5-axis mill, and a 4-axis mill.</p><p></p><p>There are certainly faster methods to make a bolt for a rifle but when the product demands precision, elegance, and bomb-proof reliability, your options are much fewer.</p></blockquote><p></p>
[QUOTE="DefianceMachine, post: 2599290, member: 117946"] [CENTER][H2]Legacy Bolt Process[/H2][/CENTER] [ATTACH type="full"]387549[/ATTACH] The bolts found on our Deviant and Rebel actions are manufactured differently than the bolts in the rest of our product line as they are machined with a full-length handle. Manufacturing a one-piece bolt of this style is a bit of an adventure. We start with a rectangular block of hardened steel from which we will get two bolts. There is a deep hole through the center for the firing pin that needs to be concentric to the outside diameter. Drilling deep holes straight is always a little challenging, not to mention in pre-hardened 4340. The handle is also a lathe-turned feature, but it is not perpendicular or centered to the body. There are always multiple ways a part can be made, and at the end of the day we come up with a process that efficiently creates the best product possible. This part has a significant number of operations including a 3-axis mill, waterjet, 5-axis mill, mill-turn center, another 5-axis mill, and a 4-axis mill. There are certainly faster methods to make a bolt for a rifle but when the product demands precision, elegance, and bomb-proof reliability, your options are much fewer. [/QUOTE]
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Machinist Mondays with Defiance
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