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ST-28LY

The ST-28LY is a long-bed, A2-8 turning center with Y-axis and C-axis
capabilities, allowing high-productivity, done-in-one machining operations.
The ST-28LY provides roughly double the Z-axis travel and turning length of
the standard ST-28Y for machining longer parts, while maintaining superior
cutting performance, and a compact footprint. A wide selection of
productivity-enhancing options and powerful standard features provides more
value than ever before.

12-station BMT65 turret
A2-8 spindle nose with 12" (305 mm) chuck
40 hp (29.8 kW) vector drive spindle
4.0" (102 mm) bar capacity
Y-axis milling, drilling, and tapping
Extended Z-axis travel for machining longer parts
Standard programmable hydraulic tailstock with #4 Morse taper
Extended tool pocket in the bulkhead provides clearance for long tools
Available Steady Rest Provision for part-face machining or supporting
extra-long parts
Made in the USA

Capacities

Chuck Size
: 305 mm
Max Part Swing
: 533 mm
Max Cutting Diameter (with BMT65 turret)
: 298 mm
Max Cutting Length (varies with workholding)
: 1080 mm
Bar Capacity
: 102 mm

Travels

X Axis
: 239 mm
Y Axis
: ± 51 mm
Z Axis
: 1080 mm

Feedrates

Rapids on X
: 12.0 m/min
Rapids on Y
: 12.0 m/min
Rapids on Z
: 24.0 m/min

Axis Motors

Max Thrust X
: 18238 N
Max Thrust Y
: 10231 N
Max Thrust Z
: 22686 N

Spindle

Spindle Nose
: A2-8
Max Rating
: 29.8 kW
Max Speed
: 3200 rpm
Max Torque
: 576.0 Nm @ 325 rpm
Spindle Bore ø
: 117.3 mm

Main Spindle C Axis

Max Speed
: 60 rpm
Max Rating
: 3.7 kW
Positioning (±)
: 0.01 °
Brake Diameter
: 353 mm
Brake Holding Torque
: 339 Nm
Control Type
: Interpolated Motion and Positioning

Turret

Number of Tools
: 12 Stations
OD vs ID Tools
: Any Combination (will vary with turret)
Boring Bar Rear Clearance (from back of turret )
: 102.0 mm

Live Tooling

Max Speed
: 4000 rpm
Tooling
: BMT65

General

Coolant Capacity
: 208 L

Air Requirements

Air Required
: 113 L/min @ 6.9 bar
Inline Air Hose
: 3/8 in
Coupler (Air)
: 3/8 in
Air Pressure Min
: 5.5 bar

Electrical Specification

Spindle Speed
: 3200 rpm
Drive System
: Direct Speed, Belt Drive
Spindle Power
: 29.8 kW
Input AC Voltage (3 Phase) - Low
: 220 VAC
Full Load Amps (3 Phase) - Low
: 70 A
Input AC Voltage (3 Phase) - High*
: 440 VAC
Full Load Amps (3 Phase) - High*
: 35 A

Dimensions - Shipping

Domestic Pallet
: 363 cm x 229 cm x 221 cm
Export Pallet
: 363 cm x 229 cm x 221 cm
Weight
: 5760.0 kg