Internal through-hole opened up to a maximum of 9/16″. Please note that while this allows larger stock to pass through the headstock, it also eliminates the #1 Morse internal taper, meaning tapered tools like drill chucks, fly cutters, etc. cannot be held in the headstock. It is also not compatible with the thread cutting attachment or lever collet closer.
Threaded tools can still be used such as 3 or 4-jaw chucks and end mill holders.
|Headstock spindle nose||9/16″|
|Headstock spindle external thread||3/4″ x 16|
|Pulley groove side angle||19°|
|Designation/stock number (ZZ refers to “double shielded”)||6004ZZ|
|Size of bore||20 mm (0.7874″)|
|Tolerance of bore||0.0004″|
|Outside Diameter||42 mm (1.6535″)|
|Tolerance of OD||0.0005″|
|Width||12 mm (0.4724″)|
|Bearings||9 balls, 1/4″ Dia.|
Headstock Bearing Replacement
We don’t recommend that customers replace the headstock bearings. We use custom fixtures to align the spindle and the bearings. You must return your headstock to our facility for bearing replacement*. Contact our customer service department, firstname.lastname@example.org, for an RMA number before sending your headstock back for service.
*NOTE: Fees apply
Click the links below to learn more about the specialized fixtures and procedures for setting the headstock bearing preload.
PDF: Replacing Headstock Bearings
Video: Setting the Headstock Bearing Preload
|31080||10-32 X 3/8″ Set Screw|
|40320||Bearing Washer (SS)|
|40330||10-32 X 5/8″ Skt Hd Cap Screw (2)|
|40420||Headstock Bearing (2)|
|40440||#2 X 1/4″ Pan Hd Sheet Metal Screw (2)|
|40520||10-32 X 3/16 Cup Pt Set Screw|
|40540||5/16-18 X 3/4″ Cone Point Set Screw|
|43239||9/16″ Headstock Spindle Pulley|
|40239||9/16″ Headstock Spindle|
|40169||9/16″ Preload Nut|
Click the P/N below to download a zipped version of the IGS 3D CAD file. You will need to extract the zip file before viewing the IGS file.
30110 9/16″ Headstock 3D IGS Model
You need an IGS viewer to view .igs files. CLICK HERE to download a FREE IGS viewer.
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. Just enter it in the appropriate box on the checkout page.
Domestic orders are shipped Monday – Friday. Expedited orders must be placed by 9 am PST to ship the same day.
Orders shipping ground have a processing time of 7 working days for domestic orders and 14 working days for international orders. CLICK HERE for more information on our shipping and order policies.
Most merchandise can be returned within 30 days 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.