3C Collet Headstock with Motor Unit

Includes 1″ spindle wrench and spindle bar

SKU: 3310 Category:

Product Description

About the 3C Collet Headstock

As with many of our accessories and machine modifications, our decision to make a 3C Collet Headstock was based on customers’ requests. Many of our customers over the years have requested a spindle and collet that would allow larger diameter stock to go through the headstock. With the 3C collet, our customers can now hold stock up to 1/2″ diameter that will pass through the headstock.

When we designed our 3C Collet Headstock we also designed it so it would be interchangeable with our standard headstock. The centerline height is the same. The mounting system is the same. Therefore you can easily switch from any of our other headstocks to the 3C headstock.

The 3C Spindle is electroless nickel plated to aid in rust prevention, and to increase the surface hardness of the spindle for durability.

We made the 1″ spindle wrench to go with the headstock to tighten and loosen the collets. The wrench is in a size range that will allow you to exert sufficient force without exerting excessive force. It is also in a size range that will make it easier to handle (than a standard 1″ wrench) when you are tightening and loosening the collet. Also included, is a “Tommy” bar that is inserted into one of the “Tommy” bar holes on the 3C headstock draw-bar knob. This is to aid in tightening and loosening the 3C collet.

If you wish to use a chuck with the 3C headstock, you can purchase our 3C to ¾-16 chuck arbor. All of our 3- and 4-jaw chucks with a ¾-16 thread will fit on this arbor.

When it comes to making the 3C collets we can’t compete with the cheap import collets, and companies like Hardinge already make quality 3C collets in many sizes. Therefore, we leave it up to you to decide who you want to buy your collets from.

NOTE: Certain attachments, like the Thread Cutting Attachment, will NOT work on the 3C Collet Headstock. Lathe Power Feed also will NOT work on with the 3C Collet Headstock. If you are uncertain if an accessory will work with the 3C Collet Headstock please call for more information.

About the Motor

This unit can be purchased to replace an existing AC/DC motor on an older Sherline machine, to turn a mill XYZ base into a complete mill so that you don’t have to swap power units back and forth from the lathe, or as a stand-alone unit for custom tooling designs. This very compact, and well-engineered unit, costs far less than other DC units of similar power offered in major industrial tool supply catalogs.

For details on the motor and speed control click on the Specifications tab above.


warning-symbol

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.

safety-glasses-symbol

Always wear safety glasses when operating machine tools.

Download PDF 30113 Instructions

Instructions PDF Download

Download PDF 3306 Instructions

Instructions PDF Download

Headstock Specifications
TIR (total indicator runout) at spindle nose 0.001″ (Better runouts may be attained upon request)
End play at factory preload setting 0.0002″ (preload is adjustable)
Motor Specifications
Motor and Speed Control ELECTRIC MOTOR SPECIFICATIONS FROM MANUFACTURER
Type of enclosure Totally enclosed, non-vented
Duty rating Continuous–10 oz. in. at 6100 rpm, .85 amperes; Intermittent–30 oz. in. at 5500 rpm, 1.75 amperes (5 minutes on / 15 minutes off)
Output horsepower .06 KW (60 W) at 10 oz. in. / 6100 rpm
AC voltage (input) Normally 115 VAC, 60 Hz, Single Phase to rectifier (Sherline electronic speed control converts any input from 100 VAC to 240 VAC, 50-60 Hz.)
DC voltage 90V DC to motor (60 Hz)
Speed in rpm 6100 rpm continuous
Class of insulation Class A, 105° (C.) insulation system
Normal full load current .85 amperes
Starting current 17 amperes instantaneous starting current (<100 milliamperes). This is also stall current in True RMS
Max current at time of changeover from lower speed to higher speed Depends on load
Type of motor 3.00 inch (outer diameter) sub-fractional horsepower brush-type permanent magnet motor
Temperature rise at ambient 50° C. Less than or equal to 45° C.
Motor frame size 3 inches
End use of motor Drive unit for lathe or mill
Part Number Description Quantity
30113 3C Collet Headstock Assembly 1
33050 DC Motor & Speed Control Assembly 1
40020 Motor Bracket 1
40040 Drive Belt 1
If you are working with brass or wood, we suggest you use the toggle switch dust cover to protect the life of your motor & speed control.