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TOS HOSTIVAR BUAJ 28-630 UNIVERSAL OD Cylindrical Grinder – Year 1992

TOS HOSTIVAR BUAJ 28-630 Universal OD Cylindrical Grinder – Year 1992
Specification	Metric	Imperial
Manufacturer	TOS Hostivar	TOS Hostivar
Model	BUAJ 28-630	BUAJ 28-630
Serial Number	129015	129015
Year of Manufacture	1992	1992
Maximum Grinding Diameter	279 mm	11 in
Distance Between Centers	635 mm	25 in
Maximum Workpiece Weight Between Centers	125 kg	276 lbs
Workhead Spindle Taper	MT #4	MT #4
Workhead Spindle Speed Range	22.4 – 710 RPM	22.4 – 710 RPM
Number of Workhead Speeds	12 Speeds	12 Speeds
Workhead Swivel	±90°	±90°
Tailstock Spindle Taper	MT #4	MT #4
Tailstock Sleeve Diameter	25.4 mm	1 in
Maximum Wheelhead Travel	267 mm	10.5 in
Hydraulic Rapid Traverse Stroke	38 mm	1.5 in
Automatic Wheel Infeed per Table Reversal	0.005 – 0.051 mm	0.0002 – 0.002 in
Automatic Plunge Infeed Rate (Coarse)	0.102 – 3.988 mm/min	0.0040 – 0.157 IPM
Automatic Plunge Infeed Rate (Fine)	0.015 – 1.016 mm/min	0.00060 – 0.04 IPM
Minimum Manual Micro-Infeed (Diameter)	0.001 mm	0.00004 in
Wheelhead Swivel	±45°	±45°
Grinding Wheel Dimensions	406 × 38 × 127 mm	16 × 1.5 × 5 in
Minimum Grinding Wheel Diameter	254 mm	10 in
Maximum Grinding Wheel Width	64 mm	2.5 in
Wheelhead Motor Power	4.1 kW	5.5 HP
Grinding Wheel Speeds	2,040 / 2,560 RPM	2,040 / 2,560 RPM
Maximum Table Travel	762 mm	30 in
Minimum Table Travel	1 mm	0.04 in
Table Swivel	8° CW / 3° CCW	8° CW / 3° CCW
Hydraulic Table Traverse Range	51 – 6,985 mm/min	2 – 275 IPM
Electrical Supply	220 / 440 Volt, 3 Phase, 60 Hz	220 / 440 Volt, 3 Phase, 60 Hz
Machine Dimensions (L × W × H)	2,616 × 1,651 × 1,524 mm	103 × 65 × 60 in
Machine Weight	2,631 kg	5,800 lbs
Equipped With	Hydrodynamic Spindle Bearings Hydraulic Table Traverse Automatic Infeed at Table Reversals Dual-Rate Automatic Plunge Infeed Power Rapid Wheelhead Advance & Retraction Spark-Out Timer (0 – 30 Seconds) Dual Live/Dead Workhead Spindle Coolant Tank with Magnetic Separator Adaptor Plate for Workhead Magnetic Chuck with Adaptor Mounted on Workhead Tool Cabinet with Accessories Separate Electrical Cabinet
Machine Features	Universal OD cylindrical grinding machine designed for precision external diameter grinding, taper grinding, plunge grinding, and shoulder grinding operations. Features automatic infeed cycles, hydraulic table movement, wheelhead swiveling, and precision hydrodynamic spindle bearings.
Machine Condition	Excellent condition and appearance with original factory paint. Available for inspection under power in warehouse.
Description	The TOS Hostivar BUAJ 28-630 is a precision universal cylindrical grinder manufactured in 1992 and designed for high-accuracy external diameter grinding applications. With a maximum grinding diameter of 279 mm, 635 mm between centers, and workpiece capacity up to 125 kg, the machine is suitable for shafts, rollers, bearing journals, precision tooling, and industrial components. The grinder features a swiveling workhead and wheelhead, automatic wheel infeed, dual-rate plunge grinding cycles, hydraulic table traverse, hydrodynamic spindle bearings, and programmable spark-out functions. Equipped with coolant filtration, magnetic chuck, tooling package, and separate electrical cabinet, the BUAJ 28-630 is ideal for toolrooms, precision engineering workshops, aerospace, automotive, and general manufacturing environments requiring accurate cylindrical grinding performance.

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TOS HOSTIVAR BUAJ 28-630 UNIVERSAL OD Cylindrical Grinder – Year 1992

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