Bison 7-563-004 Standard Point 6300 RPM 1600 lb MT4 Live Center

The Bison 7-563-004 (Type 8812-4R) is a new, precision live center manufactured by ZMKolno (Poland) and distributed by Bison USA Corp., featuring a Morse Taper 4 shank and a standard 60° conical point suited for between-centers turning and cylindrical grinding operations on lathes and grinding machines. The rotating tip assembly rides on precision roller and thrust bearings — no lubrication required during normal operation — and supports a maximum workpiece weight of 900 kg (1,600 lb) at up to 6,300 RPM, per the published Type 8812 specification chart visible in the product documentation. The 42 mm head diameter, 20 mm point diameter, and 25 mm point length are consistent with Bison's Size 4R designation in the 8812 series. Bearing service life is rated at 2,000 operating hours under radial and axial load conditions specified in the accompanying load charts. Compatible with any lathe or grinding machine tailstock accepting a Morse Taper 4 socket. Product Specifications MPN 7-563-004 Brand Bison Type / Model 8812-4R Taper Shank Morse Taper 4 (MT4) Series Size 4R Head Diameter 42.00 mm Point Diameter 20.00 mm Point Length 25.00 mm Point Type Standard 60° Max RPM 6,300 RPM Max Workpiece Weight 900 kg (1,600 lb) Bearing Type Roller & thrust bearings (self-lubricating) Bearing Service Life 2,000 operating hours Country of Origin Poland