3/4" RA-8 Automatic Multi Spindle Lathes
We have in stock National Acme 3/4" RA-8 automatic screw machines for sale, and can rebuild, retool, and/or retrofit any of our used Acme Gridley screw machines to specifically meet your needs. JEM Automatics guarantees the performance of all Acme Gridley screw machines we rebuild. Optionally, turnkey setup services can be provided, where we would supply the machine fully tooled and already proven to produce your part automatically and within tolerance before it is delivered to your plant.
The Acme Gridley 3/4" RA8 screw machine is a 8 spindle automatic lathe bar machine or collet chucker machine. Standard multispindle bar machine specifications and capacities shown are for reference only, as a custom retrofit by JEM may improve upon or modify these specifications. Many of the National Acme standard equipment options and attachments available to configure an Acme Gridley 3/4" RA8 screw machine are listed here. Please use our quick RFQ form below and we will review your specific requirements and follow up with a machinery quotation and/or recommendation for your consideration.
Acme Gridley 3/4" RA-8 Screw Machine Equipment and Attachments
(equipped based on your tooling setup)
Base Component Options:
- Lower Cross Slides - 1st & 8th position
- Upper Cross Slides - 4th & 5th position
- Intermediate Cross Slides - 3rd & 6th position
- Shelf Slide or Pocket Slide
- End Tool Slide Drill Holders
- Specify - 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, or 8th position
- One Set Collet Tubes and Collet Nuts
- One Set of Pusher Tubes
- One Set of Cams and Gears as mounted
- One Set of National Acme style Splash Guards
- Optional JEM Custom Designed High Quality Guarding
- Adjustable Stock Stop
- Optional Air Stock Stop with Stock Depletion Controls
- Chip Conveyor - Auger Style or flat Universal Conveyor
- Coolant Pump - Geared Pump or Centrifugal Pump
- Main Drive Motor and Associated Push Button Controls
- Specify Line Voltage - 240 or 480 VAC 3-phase standard
- Stock Reel and Stand
Available 3/4" RA-8 Attachment Options:
- Threading / Tapping Attachment in 3rd, 4th, 5th, 6th, or 7th Position
- Air Trip Universal Threading Attachment
- Optional Upgrade to JEM Linear Sensor 0.001" Tapping Control
- Reaming Attachment in 3rd, 4th, 5th, 6th, or 7th Position
- Air Pick-Up / Pick-Off Attachment in 7th Position
- Back Finishing / Back Working Attachment in 7th Position
- Air Operated Back Finish Attachment, or Cam Driven Back Finish Slide
- High Speed Drilling Attachment
- Rotary End Slotting / Synchronous End Milling Attachment
Other Possible Upgrades & Screw Machine Retrofits:
- Spindle Stopping Mechanism & Stopper Machine Conversion
- Collet Chucker Screw Machine Conversion & Retrofit
- Water Soluble Coolant & Spindle Carrier Seal Retrofit
- TechControl Electrical Upgrade Package for Mechanical Machines
- TechDrive Servo Machine Conversion with FANUC CNC Controls
- Single Axis Servo Cross Slides
- Compound 2-Axis CNC Slides
- Automatic Grease or Lube System for Maintenance Points
Sample pictures of Acme Gridley 3/4" RA-8 screw machine rebuild projects by JEM:
