5.45x39 rough Chamber Reamer
| gun caliber | 3 - 5.9 mm |
|---|---|
| Reamer Type | rough |
| Pilot Type | Solid |
| standard | C.I.P. |
| Material | HSS M50 |
| Manufacturer | TOKAR |
| Country of Manufacture | Ukraine |
Purpose of a Rough Chamber Reamer:
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Designed for initial chamber cutting (roughing stage) prior to finishing reaming in rifle, pistol, or shotgun barrels.
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Removes the bulk of material quickly and efficiently, preparing the chamber close to final dimensions.
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Creates a uniform pre-chamber geometry that allows the finishing reamer to work with minimal load and maximum precision.
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Improves tool life and dimensional consistency of the finishing reamer by reducing cutting resistance.
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Essential for new barrel manufacturing, re-chambering, and repair work in professional gunsmithing applications.
Key Functions:
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Rapid material removal while maintaining controlled alignment with the bore axis.
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Preparation of all primary chamber zones — body, shoulder, and preliminary neck area.
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Reduction of cutting stress on the finishing reamer, minimizing chatter and tool deflection.
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Improved chip evacuation due to optimized flute geometry designed for aggressive cutting.
Operational Recommendations:
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Always follow with a finish chamber reamer to achieve final dimensions, surface finish, and tolerance compliance.
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Leave approximately 0.2–0.5 mm (0.008"–0.020") of material for the finishing pass.
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Use high-quality cutting oil or coolant to reduce heat buildup and improve tool life.
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Maintain low spindle speeds with steady feed pressure to avoid chatter and misalignment.
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Ensure proper alignment with the bore axis using a floating reamer holder or pilot-guided system.
Advantages of Using a Roughing Reamer:
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Significantly reduces machining time compared to single-step chambering.
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Extends the lifespan of finishing reamers by reducing cutting load.
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Enhances overall chamber quality by enabling a controlled two-step process.
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Minimizes risk of tool breakage during final finishing operations.
Application:
Used by professional gunsmiths, barrel manufacturers, and precision shooting specialists for:
- Rifle chambering (bolt-action, semi-auto platforms)
- Pistol and revolver barrel work
- Custom caliber conversions
- Restoration of worn or damaged chambers
