New 21"/28" x 90" Acra Precision Gap Bed Engine Lathe (12 Speeds)(3-1/8" Spindle Bore)

Acra’s 21"/28" x 90" Precision (12 Speed) Gap Bed Engine Lathes are made in Taiwan.  Here are the basic features:

Bed

• One-piece casting base.
• Meehanite casting provides stress relief from vibration
• Induction hardened and precision ground bed ways, precision hand scraped removable gap.
• Foot brake.
• Turcite B coating between bed and carriage.

Gearbox

• Universal type allowing a wide range of inch, metric, M.P., D.P. threads without change gears.

Headstock

• Housing is vibration-absorbent, deflection-free.
• Gears are hardened & MMG or REISHAUER ground.

Heavy Duty Spindle

• Machined from forged alloy steel, hardened ground & dynamically balanced.
• Three point support by high grade precision, machine tool taper roller & ball bearings.

Apron

• RIH or LJH wheel can be available on request.
• Integrated automatic control for longitudinal & cross feeds, forward & reverse feeds.

Carriage & Slide

• Anti-Float design backlash eliminator fitted in cross slide nut
• Safety clutch at feed shaft
• One shot lubrication in carriage & top slide
• Dual dials supply inch system screw
• Metric dial supply metric system only

Safety Features

• Nylon safety gears in end train
• Shear pin in leadscrew

Specifications

• Capacity: 21″/28″ x 86″
• Swing Over Bed: 21″
• Swing Over Cross Slide: 15-1/4″
• Swing In Gap: 28-3/4″
• Distance Between Centers: 86.6″
• Center Height: 10.67″
• Bed Width: 12-1/2″

Headstock

• Spindle Nose: D1-8
• Spindle Bore: 3-1/8″
• Taper of Spindle: MT No. 5
• Spindle Speeds – Steps: 12 Step
• Spindle Speeds – Range: 26 ~ 1,500 RPM

Carriage

• Cross Slide Travel: 11.81″
• Compound Slide Travel: 5.9″

Threads & Feeds

• Inch Threads: 2~72 TPI
• Metric Threads: 0.2 ~ 14 mm
• Longitudinal Feeds: 0.0015 ~ 0.04″/rev
• Cross Feeds: 0.00075 ~ 0.02″/rev

Tailstock

• Quill Diameter: 2.67″
• Quill Travel: 6″
• Quill Taper: MT No. 4

Power

• Spindle Drive Motor: 12-1/2 HP
• Voltage: 230V or 460V AC / 3 PH

Standard Equipment

• 12″ 3-Jaw Chuck
• 16″ 4-Jaw Chuck
• Full Length Splash Guard
• Steady Rest/Follow Rest
• Coolant System
• Foot Brake
• Work Lamp
• Gap Bed
• 4 position square tool post
• Tool box with tools
• 2 Speed Tailstock