Iscar 5505705 Turning Shim Rct 3/8 Inch Diamond Insert

Product Description

The ISCAR 5505705 is an RCT-series shim designed for indexable turning toolholders. Shims seat beneath the cutting insert to maintain precise pocket geometry, protect the toolholder body from wear, and ensure repeatable insert positioning during turning operations. This shim is compatible with diamond-shaped inserts and fits DCBNR/L-style toolholder bodies. It supports both left-hand and right-hand cutting directions, making it a versatile service item for a CNC lathe or manual turning setup. The insert inscribed circle is 3/8 inches (0.3750 inches decimal), which is the key dimension for confirming fitment to the correct pocket size. Installation is straightforward and requires no special tooling beyond standard insert-seating practices.

This shim is intended for use in metal-cutting turning applications where indexable insert toolholders are in service. It is appropriate for both production CNC environments and manual lathe work. The RCT shim style is matched to specific DCBN and DCLN toolholder families. Compatible complete toolholder models listed by the manufacturer include DCBNL 16-4, DCBNR 16-4, DCLNL 12-4, DCLNL 16-4, DCLNL 20-4, DCLNR 12-4, DCLNR 16-4, and DCLNR 20-4. Machinists and toolroom technicians typically keep replacement shims on hand as a standard maintenance item, since shim damage or wear can affect insert seating and surface finish quality.

Key Features

• RCT shim style matched to DCBNR/L and DCLNR/L indexable toolholder bodies
• Compatible with diamond-shaped indexable inserts
• 3/8 inch (0.3750 inch) inscribed circle sizing for precise pocket fitment
• Supports both left-hand and right-hand cutting directions
• Lightweight replacement component at 0.025 pounds for easy stocking

Compatibility

Compatible with the following complete toolholder models as specified by the manufacturer: DCBNL 16-4, DCBNR 16-4, DCLNL 12-4, DCLNL 16-4, DCLNL 20-4, DCLNR 12-4, DCLNR 16-4, and DCLNR 20-4. Toolholder style compatibility is DCBNR/L. Insert shape compatibility is diamond. Confirm inscribed circle size of 3/8 inches before ordering.

Installation Notes

This shim is installed and replaced by machinists or toolroom technicians during routine insert indexing or toolholder maintenance. Before servicing the toolholder, ensure the machine is powered down, the spindle is locked, and all motion has stopped. Remove the existing insert and clamp hardware, seat the replacement shim flat in the insert pocket, and reinstall the insert and clamping components according to the toolholder manufacturer's torque sequence. Do not reuse a shim that shows visible deformation, cracking, or seating surface damage.