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Mill Ball Screw XYZ Axes Retrofit Kit

2-3 week lead time

When ordering your new Ball Screw Retrofit Kit, you will need to supply the following information for your current machine so we can ensure you receive the correct length of the ball screw for each axis:

Please note that our ball screws only come in a metric pitch
    • 65 $
SKU: 6830 Category: Tag:

Product Description

Key Upgrade Parts

The key upgrade parts for this ball screw retrofit kit include ball leadscrews, stepper motor high-torque coupling, and the ball screw mill saddle (with nickel / Teflon plate) for the X/Y-axes, and a ball leadscrew, stepper-motor coupling, vertical milling column saddle for ball screws, and column saddle Z-axis ball nut mount.

Ball Leadscrew Specifications

  • Rolled Ball Screw with BSH Nut
  • 10mm Diameter, 2mm Lead
  • C7 Accuracy*, P1 Preload
    *C7 accuracy has a linear tolerance of 50 micrometers / 300mm or .002″ / 12.0″.

Regarding Retrofits

  1. The charge for all ball leadscrews is the same, regardless of the overall length. This is because the manufacturer does not give us a price break on the shorter screws (in fact, they wanted more for a 6″ ball screw). All screws come in at 400mm (15.75mm) long, and we cut them to length to fit the individual machine axis.
  2. All retrofits come with the stepper-motor mounts, high-torque couplings, bearings, preload nut, and ball screw fully assembled in our factory. We do not sell these parts individually for you to assemble.
  3. The ball leadscrew and the rest of the assembly are assembled and checked in our factory. We place an O-ring on the end of the ball screw, below the saddle, away from the motor mount. The O-ring is placed there to help ensure that the ball nut does not thread itself off the ball screw. If the ball nut threads off the ball screw, the balls in the ball nut will come out. At this point, the ball screw is scrap. There is no way to fix it! For this reason, the O-ring is to remain on the ball screw until the ball screw assembly is fully assembled on your machine. After you have assembled your ball screw on your machine, you may remove the O-ring.
    NOTE: On retrofits, the only way possible for your ball leadscrew to have excessive slop (backlash), is if some of the balls have come out of the ball nut. We will not replace ball leadscrews that have excessive slop (backlash)!

Regarding the Hole Modification through the Mill Column Base

For all mill retrofits, you must drill a ½” hole through your column base. This is a clearance hole for the brass cover tube to go through the column base. On page 5 of the instructions, there are copies of the prints for both the standard column base and the rigid and 2000 column bases.

If you would like us to do the machining, the cost will be $60.00 plus your return shipping. You will need to select this option from the drop-down above, and we will provide information on how to send your column base back once we receive your order.

You can also purchase a new column base with the 1/2″ already drilled. The base for our 5000/5400 series mills is part number 50054, part number 56714 for the 2000 series mills, and part number 50055 or 50056 for the rigid column bases.

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The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.

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Always wear safety glasses when operating machine tools.

Download PDF Ball Screw Retrofit Notice

Instructions PDF Download

Download PDF 6810 X/Y-axes Exploded View

Instructions PDF Download

Download PDF Ball Screw Upgrade Benefits

Instructions PDF Download

Download PDF 6800 Z-axis Exploded View

Instructions PDF Download

Retrofitting a Sherline Mill with an X/Y-Axis Ball Screw Saddle

Aligning the Ball Nut to the Stepper Motor

Retrofitting a Sherline Mill with a Z-Axis Ball Screw Column

Shipping

We do not charge a flat rate for shipping because of the variations in weight for our products. Instead we charge you what the shipping company charges us. Our website uses a shipping calculator based on the daily rates for USPS and UPS based on the weight and destination of the shipment. You can also have us use your UPS/FedEx account number to charge your shipping to. Just enter it in the appropriate box on the checkout page.

Domestic orders are shipped Monday – Friday. Expedited orders must be placed by 11 am PST to ship the same day.

Orders shipping ground have a processing time of 2-3 working days for domestic orders and 4-5 working days for international orders. Click here for more information on our shipping and order policies.

Returns

Most merchandise can be returned within 30 day of the purchase date. A refund will be issued to the original form of payment at the original selling price. View our complete return policy and/or start your return online here.

 

For optimal performance, we recommend using the High-Torque Stepper Motors with our Ball Screws.