Center drills are used with the lathe to drill a hole in the end of stock for mounting between centers in the lathe. They are designed to drill a small diameter pilot hole followed by a 60° countersink that provides a bearing surface for the 60° point of the lathe center. Center drills are also used extensively with the milling machine to start holes accurately. The hole locations can be dialed in by using the milling machine’s calibrated handwheels; then the hole is started using the center drill.
The set includes three double-ended, high-speed steel drills:
- #1 drill has a 1/8″ shank
- #2 drill has a 3/16″ shank
- #3 drill has a 1/4″ shank
The large diameter shank on the center drill holds the drill point right on center and keeps it from “walking” as the hole is started. Once the hole is started, the center drill is replaced with a drill of the desired diameter and the hole is finished.
CAUTION: It is imperative that a cutting lubricant is used, and the center drill is backed off several times to prevent the smaller tip from twisting off.
|Drill Material||High Speed Steel|
|Shank Sizes||1/8″, 3/16″ and 1/4″|
|#1 Center Drill||30240||$7.50||More Info|
|#2 Center Drill||30260||$7.50||More Info|
|#3 Center Drill||30270||$7.50||More Info|
|#000 Center Drill||30280||$9.50||More Info|
|#00 Center Drill||30290||$8.50||More Info|
|#0 Center Drill||30300||$8.50||More Info|
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 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 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.