SUMITOMO GND slotting tool holder selection and troubleshooting

SUMITOMO GND slotting tool holder selection and troubleshooting

In turning machining, grooving, cutting, end face grooving, and inner hole grooving are often the processes that are most prone to exposing process problems. Problems such as vibration, poor chip removal, blade breakage, surface tearing during machining, and short tool life often require engineers to repeatedly adjust between machine tools, tool holders, blades, and cutting parameters. The GND series grooving tool holder revolves around high rigidity, vibration resistance, excellent chip removal, and rich chip breaking grooves, providing a systematic solution for small part lathes, Swiss lathes, automated production lines, and universal turning centers. This article compiles a technical guide for on-site engineers from five dimensions: product structure, chip groove selection, material matching, common troubleshooting, and practical cases.

GND series product architecture and core advantages

The GND series is not a single tool holder, but a complete product family covering outer circular groove cutting, cutting, profiling, end face groove cutting, inner hole groove cutting, neck cutting, and multifunctional processing. Its basic models include GNDM, GNDL, GNDS, GNDN, GNDI, GNDIS, GNDF, GNDFS, GNDXL, GNDZ, GNDZS, etc., and extend to GND Modular modular system and PSC polygonal tool holder system.

The integral GND handle adopts an integral structure and a mold steel blade body, which significantly improves the anti vibration ability compared to conventional blade handle. Official data shows that its high rigidity design can reduce vibration by about 30%. In the structural steel groove cutting test, the GND tool holder remained stable at a feed rate of 0.012 IPR, while conventional products showed significant vibration at 0.0031 IPR. This means that GND can achieve a processing efficiency improvement of over 300% under high feed conditions. For the processing of slender shafts, thin-walled parts, and small components, this anti vibration ability directly determines the surface quality and tool life.

The GND Modular modular system is designed for flexible production. It adopts a modular structure with coolant supply, supporting square tool holders of 0.75 inches, 1.00 inches, 1.25 inches, and 25mm, as well as PSC40, PSC50, and PSC63 polygonal tool holders. All specifications are available in 0 ° and 90 ° directions, suitable for slotting, cutting, tanker and end face slotting. Modular design reduces inventory requirements for multiple tool holders while maintaining high rigidity connections.

The blade holder size covers 1.25mm to 8.0mm, with a cutting width tolerance of ± 0.03mm. Some blades use high-precision sintering technology, which can achieve a cutting width accuracy of ± 0.0012 inches even without grinding. This is particularly important for cutting grooves in precision small parts, as groove width tolerances directly affect assembly and sealing performance.

Chip groove selection: from universal groove to cutting and copying

The GND series offers ten types of chip breakers, covering cutting, profiling, neck cutting, and non-ferrous metal processing. Choosing the right chip breaker is the first step in solving chip removal and blade breakage problems.

MG: Universal groove and transverse turning chip breaker, suitable for standard groove and transverse cutting.

ML: Low feed chip breaking groove, suitable for working conditions with small feed and limited chip space.

GG: The preferred chip breaker for universal grooving is the first recommendation for grooving applications, which balances chip control and processing stability.

GL: Low feed chip breaking groove, suitable for low feed and poor chip discharge conditions.

GF: Low cutting force chip breaker, suitable for low feed and thin-walled parts, can reduce cutting resistance.

CG: The preferred chip breaker for universal cutting, with a front angle of 5 °, is suitable for most cutting applications.

CF: Low cutting force cutting chip groove, front angle of 10 °/15 °, suitable for cutting small parts and low rigidity machine tools.

RG: Outer circle contour and radius cutting groove chip breaking groove, suitable for contour machining.

RN: End face, inner hole, neck cutting, and contour chip groove, suitable for machining with retreat or interference avoidance.

GA: Dedicated chip breaker for non-ferrous metals, suitable for materials such as aluminum and copper.

In troubleshooting, if the chips are long or tangled, ML, GL, or CF should be prioritized; if the chips are blocked in the groove, the internal cooling pressure and chip breaker groove should be checked for compatibility; If there is a central burr during cutting, a chiral CF chip breaker can be used to eliminate the burr using the direction of the cutting edge. If the tool interferes during the copying process, the RN chip groove is longer than the RG, which can effectively avoid interference between the tool holder or blade and the workpiece.

Material selection: Match according to the workpiece material

The GND series can be paired with various coated hard alloys, CBN, and PCD materials. Common materials include: