Bison 7-886-306 Pinion KZ 3100 3200 3600-160 Lathe Chuck Pinion
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This is a new, genuine Bison (Bison-Bial) replacement pinion gear, part number 7-886-306, manufactured in Poland and labeled PINION KZ 3100 3200 3600-160 (Kółko KZ 3100 3200 3600-160 in Polish). The part is a bevel-style scroll pinion — the keyed drive gear that engages the scroll plate inside a self-centering lathe chuck — and is compatible with Bison KZ-series 3-jaw and 6-jaw chucks in the 3100, 3200, and 3600 series at the 160mm chuck body size. The pinion features a helical/spiral tooth profile on a tapered body with a flanged collar at the top and a knurled stub shaft at the bottom for chuck key engagement, machined from steel to Bison's precision standards. MAT. code 398533430101 is the Bison internal material/traceability number; Code No. 7-886-306 is the ordering part number. This is an OEM service part intended for rebuilding or repairing worn Bison chucks to restore original gripping accuracy and jaw synchronization.
Product Specifications
| Brand | Bison (Bison-Bial) |
| Part Number (Code No.) | 7-886-306 |
| Material Number (MAT.) | 398533430101 |
| Compatible Chuck Series | KZ 3100, KZ 3200, KZ 3600 |
| Compatible Chuck Size | 160 mm |
| Component Type | Scroll Pinion (Bevel Drive Gear) |
| Country of Origin | Poland |
| Condition | New |