What to Look for When Buying a Used Atrump
Atrump machines are built on heavy Meehanite cast iron frames with straightforward mechanical designs. Used units are relatively easy to evaluate, but there are key areas to inspect before purchasing.
Check spindle condition and bearing wear. Run the spindle across the full RPM range and listen for unusual noise, vibration, or heat buildup. On VMCs, test at both low-torque and high-speed settings. On lathes, measure spindle runout at the chuck face and verify smooth drawbar engagement. Excessive bearing noise or thermal drift after warm-up indicates costly wear.
Inspect the way system and axis movement. Atrump machines use box-way construction on most models. Check for scoring, discoloration, or uneven wear on way surfaces. Jog each axis through full travel and feel for tight spots or backlash. On CNC models, cut a test circle to verify geometric accuracy.
Evaluate the CNC control. Most Atrump CNC machines run Centroid controls. Verify that the control powers up cleanly, loads programs without error, and communicates with all axes and the spindle. Check for screen artifacts, unresponsive buttons, or intermittent faults. Centroid controls are well-supported with parts and software updates, so minor issues are often repairable at reasonable cost.
Test the automatic tool changer on VMCs. Cycle the ATC through every pocket and verify accurate indexing. Listen for grinding or hesitation during changes. A worn or misaligned ATC can cause crashes and costly spindle damage during production.
Atrump Vertical Machining Centers
Space Series VMCs
The Space series is Atrump's flagship VMC platform. The Space 5 is a compact machining center with 20" x 16" travels suited to small parts and prototyping. The Space 8 offers 30" x 16" travels with a BT40 spindle rated at 8,000 RPM or higher, making it a popular job shop machine. The Space 10 provides 40" x 20" travels for larger workpieces. All Space series machines feature Meehanite cast iron construction and Centroid CNC controls as standard.
Atrump CNC Lathes
RL Series Turning Centers
The RL series includes slant-bed CNC lathes built for production turning. The RL-1640 offers a 16" swing over the bed with 40" turning length, suitable for a wide range of chuck and shaft work. Standard features include hardened and ground box ways, hydraulic chuck and tailstock, and Centroid T-400 or Fanuc controls. RL-series lathes are valued on the used market for their straightforward design and low maintenance.
Atrump Milling Machines
BM Series Bed Mills
The BM series bed mills (BM-3V, BM-4V, and larger) provide a rigid, fixed-bed platform available with manual handwheels, power feed, or full Centroid CNC control. The fixed-bed design eliminates flex inherent in knee-type mills, making BM machines a strong choice for heavier cuts.
KM Series Knee Mills
The KM series (KM-3S, KM-3VS, and variants) follows the traditional knee mill format. Available in manual, power-feed, and CNC configurations, the KM series serves tool rooms, maintenance departments, and educational programs.
How to Sell Your Used Atrump
Atrump machines hold solid resale value thanks to durable construction, simple mechanical design, and broad appeal among job shops.
Resell CNC buys used Atrump machines of every model and generation, nationwide.
- Contact us at (844) 478-8181 or sales@resellcnc.com.
- Free appraisal within 24 hours, no obligation.
- Accept the offer and we handle rigging, transport, and logistics.
Frequently Asked Questions About Used Atrump Machines
Are used Atrump machines reliable?
Yes. Atrump machines are built on heavy Meehanite cast iron frames with hardened and ground way surfaces. The rigid construction and straightforward design translates to machines that hold accuracy over many years of service.
What CNC control does Atrump use?
Most Atrump CNC machines are equipped with Centroid controls. The M-400 and M-560 are common on milling machines and VMCs, while the T-400 is standard on CNC lathes. Select models are available with Fanuc or Siemens controls.
What should I inspect before buying a used Atrump?
Focus on the spindle (runout, bearing noise, thermal stability), way surfaces (scoring, even wear), and axis movement (backlash, smooth travel). On VMCs, cycle the ATC through every pocket. On lathes, verify the hydraulic chuck, tailstock alignment, and turret indexing.
What Atrump models hold their value best?
Space series VMCs (particularly the Space 8 and Space 10) and RL-series CNC lathes maintain the strongest resale values. Machines with newer Centroid controls tend to command higher prices. Call (844) 478-8181 for current valuations.
Where are Atrump machines manufactured?
Atrump machines are manufactured in Taichung, Taiwan. The company operates its own casting, machining, and assembly facilities, maintaining control over the full production process.
Is Atrump still in business?
Yes. Atrump Machinery Inc. continues to manufacture and distribute CNC machines worldwide with an active dealer network across North America.
Does Resell CNC offer financing on used Atrump machines?
Yes. Resell CNC offers flexible financing options to help your business acquire the equipment it needs. Contact us at (844) 478-8181 to discuss terms.
How do I sell my used Atrump?
Contact Resell CNC at (844) 478-8181 or sales@resellcnc.com. We buy every Atrump model nationwide. Free appraisal within 24 hours.