| Bore Type | Straight |
| Bore Diameter | 0.787 Inch | 20 mm |
| Outside Diameter | 1.654 Inch | 42 mm |
|
Overall Height/Width
|
0.472 Inch | 12 mm |
|
Contact Angle
|
0° |
| Closure Type | Double Sealed |
| Enclosure Type | Non Contact Seal |
| Bearing Type | Tapered Roller Bearing |
| Internal Clearance | C5 |
| Material | Steel |
| HTC | 8482.10.50.68 |
|
Precision Class
|
ABEC 5 | ISO P5
|
 |
 |
| Max Dynamic Radial Load (with 90% reliability) | 9.4kN (2,113 lbf pound-force) |
| Max Static Radial Load | 5kN (1,124 lbf pound-force) |
| Max Dynamic Axial Load | 3.3kN (741 lbf pound-force) |
| Max Static Axial Load | 2.5kN (562 lbf pound-force) |
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Important Update Regarding Sherline Products
October 20, 2026
We would like to share an encouraging development regarding the future of Sherline Products.
We are currently in discussions with an American manufacturer regarding the potential purchase of Sherline’s intellectual property and remaining inventory. The goal of this proposed acquisition is to preserve and revitalize the Sherline brand while providing continued availability of replacement parts, accessories, and machines for our valued customers.
As these discussions progress, we have agreed to temporarily suspend accepting new orders, effective October 19, 2026. This will allow us to preserve our remaining inventory while negotiations are underway.
Although no final agreement has been reached, we are hopeful that this opportunity will provide a positive path forward for the Sherline name and the customers who have trusted our products for more than five decades.
We sincerely appreciate your patience, understanding, and continued loyalty during this transition. We will share additional information as soon as it becomes available.
Our greatest hope is that the Sherline legacy of quality, precision, and American craftsmanship will continue for generations to come.
Karl Rohlin III and Charla Papp
Co-Owners, Sherline Products, Inc.
October 20, 2026
We would like to share an encouraging development regarding the future of Sherline Products.
We are currently in discussions with an American manufacturer regarding the potential purchase of Sherline’s intellectual property and remaining inventory. The goal of this proposed acquisition is to preserve and revitalize the Sherline brand while providing continued availability of replacement parts, accessories, and machines for our valued customers.
As these discussions progress, we have agreed to temporarily suspend accepting new orders, effective October 19, 2026. This will allow us to preserve our remaining inventory while negotiations are underway.
Although no final agreement has been reached, we are hopeful that this opportunity will provide a positive path forward for the Sherline name and the customers who have trusted our products for more than five decades.
We sincerely appreciate your patience, understanding, and continued loyalty during this transition. We will share additional information as soon as it becomes available.
Our greatest hope is that the Sherline legacy of quality, precision, and American craftsmanship will continue for generations to come.
Karl Rohlin III and Charla Papp
Co-Owners, Sherline Products, Inc.
Image shown is a representation only. Actual product may vary.
3C Headstock Class 5 Bearing
Our Class 5 (C5) bearings are lifetime-lubricated and feature an adjustable preload for optimal performance. These precision bearings provide superior accuracy, tighter tolerances, smoother and quieter operation, and cooler running temperatures. The bearings are factory-set with a preload of .0002″, rated for continuous operation up to approximately 4,000 RPM. For higher-speed applications, up to 10,000 RPM, a slightly looser preload of .0003″ may be required.
We do not recommend customers attempt to replace the headstock bearings themselves. Proper bearing installation requires the use of specialized fixtures to ensure perfect spindle and bearing alignment.
If you are unable to press the bearings in yourself, you may return your headstock to our facility for professional replacement. Please contact our customer service department at kim@sherline.com to obtain an RMA number before sending your headstock in for service.
Note: Service fees apply.
Learn more about our specialized tools and procedures for setting the headstock bearing preload:
PDF: Replacing Headstock Bearings
Video: Setting the Headstock Bearing Preload