Product Overview

Acra’s 2290ACH Precision Gap Bed Engine Lathes are made in Taiwan and feature:

Bed:

Meehanite cast iron to help relieve stress cause by vibration.
Induction hardened (HS70°) and precision ground
Precision hand scraped removable gap
Foot brake

Universal Gear Box:
• Oil bath lubrication
• Heat treated gears
• Inch/metric/module/diametrical threads
• Output shaft is designed with a safety pin

Apron and Saddle:
• Manual and Automatic lubrication systems where oil is distributed to the bed ways and cross slide.
• Overload protection device
• Cross slide is hardened and precision ground
• Cross slide screws are hardened and bathed in Oil.
• Forward-Off-Reverse lever
• Top and saddle slide locking system
• T-slot compound

Spindle:
• Supported by 3 precision p-grade taper roller bearings
• Dynamically balanced, hardened and precise ground
• D1-11 Spindle Nose, 4.09" Spindle Bore

Headstock:
• All gears are made of chromium molybdenum steel and segmentation treated and precision ground
• Forced lubrication system

Tailstock:
• Quill made of chromium molybdenum steel and segmentation treated and precision ground
• Diameter 2.935" & 7" Spindle travel
• 2 Speeds 1:1 & 1/4:1 Change gears

Specifications:

Capacity: 22″/31″ x 90″

Swing Over Bed: 22″
Swing Over Cross Slide: 13-3/8″
Swing in Gap: 31-3/8″
Distance between Centers: 90″
Bed Width: 15-3/4″
Center Height: 11″

Headstock:
Spindle Nose: D1-11
Spindle Bore: 4-1/16″
Taper of Spindle: MT NO.7 x MT NO.5
Spindle Speeds – Steps: 12
Spindle Speeds – Range: 13 ~ 1,200 RPM

Carriage:
Cross Slide Travel: 15-3/4″
Compound Slide Travel: 9-1/2″

Threads & Feeds:
Inch Threads: 2 ~ 72 TPI
Metric Threads: 0.2 ~ 14 mm
Longitudinal Feeds: 0.0012 ~ 0.039 in/rev
Cross Feeds: 0.0004 ~ 0.0117 in/rev

Tailstock:
Quill Diameter: 2.935″
Quill Travel: 7″
Quill Taper: MT NO.5

Power:
Spindle Drive Motor: 15 HP/4P
Voltage: 230 or 460V AC/3 PH

Standard Equipment: