SUMITOMO PSZ Turn Quick Change System Selection and Troubleshooting

SUMITOMO PSZ Turn Quick Change System Selection and Troubleshooting

In sliding head lathes, multi spindle lathes, and precision machining of small parts, tool change downtime, tool head repeat positioning accuracy, and coolant supply method often directly determine production line efficiency and part consistency. The PSZ Turn series quick replacement system revolves around three points: using a clamping screw to complete the tool head replacement, ensuring repeatability with a polygonal conical structure, and directly delivering coolant to the cutting edge through an internal cooling channel. For engineers who are looking for "how to quickly change tools without sacrificing rigidity", understanding the tool head system, selection logic, and common troubleshooting paths of PSZ Turn can significantly reduce trial cutting and downtime.

The core structure of PSZ Turn: single screw clamping and polygonal cone surface

The most intuitive feature of PSZ Turn is "one screwdriver head". The handle and blade are positioned through a polygonal conical surface. Loosen the clamping screw to remove the blade, install a new blade, and tighten it. The official repeatability is within 5 μ m, covering the X-axis, Z-axis, and Y-axis center height directions. This means that after replacing different tool heads on the same handle, there is no need to frequently re align the tool, especially suitable for sliding head lathes with multiple process merging.

The polygonal cone surface is not a simple cone fitting, but rather improves torsional rigidity through multi-faceted contact. Compared with the integral tool holder, the modular connection of PSZ Turn does not significantly sacrifice stability, but instead reduces tool holder inventory and downtime due to the independent replacement of the blade head. The handle provides metric 10, 12, 16, 20mm and imperial. 375,. 500,. 625,. 750 inch square handles, and the blade head can be used interchangeably for both metric and imperial handle sizes. All knife handles are optional for internal cooling, with coolant flowing directly from the inside of the handle to the blade head, reducing external hoses and fittings and avoiding chip entanglement.

Knife head system: from cutting grooves, threading to turning back

The tool head of PSZ Turn covers turning, grooving, threading, backturning, and profiling. Common series include:

PSZ GNDR/GNDL: External groove cutting and cutting. GNDR is right-handed and GNDL is left-handed, compatible with GCMN series blades, with a cutting width covering 1.25mm to 3.0mm and a cutting depth covering 7mm to 17mm. Suitable for small part groove cutting, retaining ring groove cutting, and cutting.

PSZ SVJB/SVJC/SVHC: External turning and profiling. SVJB and SVJC are used for outer circle profiling, while SVHC is used for multi-purpose profiling and end face. Suitable for VBMT, VCMT and other positive angle blades, suitable for contour machining and end face turning.

PSZ PCLN/PDJN: External turning and end turning. PCLN is compatible with CNMG/CNMM, while PDJN is compatible with DNMG/DNMM, covering rough to fine machining.

PSZ SBT: Back turning tool head. Used for back turning and chamfering, suitable for sliding head lathes to complete back processing in one clamping, reducing secondary clamping.

PSZ TGAR: outer circular groove. Suitable for TGAR series slotting blades, covering cutting widths of 0.8mm to 4.8mm, suitable for deep slotting and cutting.

PSZ ER: External thread cutting head. Compatible with 16ER series thread inserts, covering ISO metric, UN unified threads, Whitworth, NPT, BSPT and other tooth types, suitable for external thread turning.

TTE: Threaded blade, compatible with PSZ TGAR cutting head, used for internal and external threads, covering 60 ° and 55 ° tooth profiles.

When selecting, first determine the process: select GNDR/GNDL or TGAR for groove cutting; PCLN/PDJN is selected for external turning; Select SVJB/SVJC/SVHC for imitation; Choose SBT for the back car; Choose ER or TTE for threads. Re determine the tool holder size: Small part lathes commonly use 10mm or 12mm square handles, and multi spindle lathes commonly use 16mm or 20mm. Finally, match the blade material: choose AC530U, AC5015S, AC5025S for steel parts; Choose AC5015S and AC5025S for stainless steel; Cast iron selected AC425K; Choose H1 and DL1500 for non-ferrous metals; BN2000 and DA2200 are selected as high hardness materials.

Installation and tool replacement: details determine repeatability accuracy

The repeatability accuracy of PSZ Turn depends on cone cleaning and clamping torque. When changing the knife, the handle cone and blade cone should be cleaned with non-woven fabric or compressed air first to confirm that there are no chips, oil stains, or burrs. When installing the blade, align the cone surface of the blade with the cone surface of the handle, gently push it into place by hand, and then tighten the clamping screw. It is recommended to use a torque wrench, and the torque values refer to the specifications of the tool holder: PSZ10 and PSZ12 are usually 2-3.5N · m, PSZ16 is 3.5-5N · m, and PSZ20 is 5-7.5N · m. Insufficient torque can cause loosening and vibration of the tool head, while excessive torque can damage the cone surface or screws.