In order to firmly hold, center, and locate workpieces for machining—often without impeding the exterior surfaces—bore clamps, also known as ID clamps, are precise workholding devices that extend inside a machined hole or bore. They are extensively utilized in high-repeatability CNC drilling, milling, and machining. A mechanical tool called a bore clamp is used to hold, align, or stabilize cylindrical objects, usually while they are being machined, assembled, or tested. It holds a bore (cylindrical hole) firmly without deforming the component by applying a radial force around the bore's outside or interior.

When working with shafts, pipelines, or machinery that has round holes, a bore clamp is a mechanical tool used to secure, align, and support cylindrical components. Because they offer a dependable means of holding components in place without causing harm to their surfaces, these clamps are frequently employed in industries like manufacturing, automotive, aerospace, and construction.In order to accommodate different bore sizes, bore clamps usually have a screw, wedge, or hydraulic mechanism that enables them to expand or compress.For industries that need precise placement and safe handling of cylindrical components, bore clamps are indispensable instruments.

They are essential in both industrial and workshop contexts because they combine strength, accuracy, and versatility.A specialized workholding instrument called a bore clamp is made to hold a workpiece from the interior of a hole or bore.Bore clamps are multipurpose workholding tools that provide high accuracy, self-centering, and downward (pull-down) clamping force while expanding internally to grasp a workpiece's interior diameter (ID). This enables five-sided machining.

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