Screw Machine Products

We make a wide range of precision parts, such as ball studs, knurled bushings, shoulder screws, threaded fasteners, specialty fasteners, pins, and service parts. When quantities fall below 10,000 pieces we turn to our single spindle Brown and Sharpe Department. From the simple to the complex, JCG’s Brown and Sharpe Department can turn jobs around quickly and provide quality screw machine products that meet today’s tough quality ISO standards. All of our screw machine products are produced to ISO 9001 quality standards.


High Volume Screw Machine Products

We make a wide range of custom parts in our shop, such as bushings, nuts, inserts, fittings, spacers, rivets, and more in high volume. For orders requiring quantities of over 10,000 pieces, JC Gibbons Manufacturing relies on our multi-spindle screw machine (Davenport Screw Machine) Department. With 20 screw machines running over two full shifts, JCG can produce quantities well into the millions. Through our machine upgrade and rebuild program, JCG can continue to manage tight tolerances. Our planning for the future sets us apart from other screw machine companies.


What is a Davenport Screw Machine?

From the beginning, Davenport invention revolutionized screw machine technology. The remarkable 5-spindle Model B became a legend. The respected Davenport name embraces an ever-growing spectrum of finely engineered products and Brinkman International is committed to the industry. Davenport innovation will continue to make history for another 100 years.

 Since 1900 the Model B has been the most profitable multi spindle automatic screw machine available. You’ve heard it a thousand times – time is money. This is especially true in the screw machine parts business. That’s why so many successful managers turn to Davenport Machine to increase their company’s profit. With a Davenport:

• It takes less time to make a part 

• Set-up is simplified and operating time is minimal 

• Stock feed length is changed with a crank 

• Non-cutting time of tools is as little as two-fifths second 

• Adjustments for cross slides and tool arms are at the front of the machine 

• When changing from one feed to another only one gear requires changing 

• Extra sleeves can be provided to carry all cross slide and “turret” cams for the next job 

• A simple, high speed loading attachment is operated from the regular working position 

• Part chute delivers finished work 

• Compensating stop screw is rigidly mounted on the cross slides and rear tool arm 

• All levers for feeding and operating are at the front of the machine and an extra starting lever is located at the rear

The Davenport lets you do more. A vast array of precision attachments gives the Davenport the flexibility you want. Plus, an overall know-how built on experience unmatched in the industry means proven design, precision parts and rugged construction. This is why the Davenport is on the job, running year after year.



What are attachments and what kind of attachments are there for screw machines?

Attachments are what give screw machines an advantage over any other machine tool in the world. The use of attachments for procedures such as cross drilling, slotting, thread rolling, and flat generation, allow screw machines to perform a wide variety of machine operations while maintaining the fastest cycle times in the industry.

Burring Attachments

Countersink Attachments

Spindle Stopping

Revolving Spindles

Idler Gear Arrangements

Revinloc For Broaching

Rotary Slotters

Revinloc and Offside Milling

Keyway Milling

Straddle Milling

Cross Drillers

Cross Tapping

Spindle Locating


Thread Rolling

Transfer Attachments

Ejector Attachments

Bent Shank Tapping

Cross Slide Attachments

Aligning Gears


Low Volume Screw Machine Products

What is a Brown and Sharpe screw machine? 

Brown & Sharpe is a division of Hexagon Metrology, Inc., a multinational corporation focused mainly on metrological tools and technology. During the 19th and 20th centuries, Brown & Sharpe was one of the best-known and most influential machine tool builders and was a leading manufacturer of instruments for machinists (such as micrometers and indicators). Its reputation and influence were such that its name is often considered to be inseparably paired with certain industrial standards that it helped establish, including:

•The American wire gauge (AWG) standards for wire;

•The Brown & Sharpe taper in machine tool spindle tapers; and

•The Brown & Sharpe worm thread form for worm gears.

Since being acquired by Hexagon Metrology in 2001, Brown and Sharpe has concentrated exclusively on metrology equipment.


What is a speciality fastener?

A fastener is a hardware device that mechanically joins or affixes two or more objects together.

Fasteners can also be used to close a container such as a bag, a box, or an envelope; or they may involve keeping together the sides of an opening of flexible material, attaching a lid to a container, etc. Fasteners used in these manners are often temporary, in that they may be fastened and unfastened repeatedly.  There are three major steel fasteners used in industries: stainless steel, carbon steel, and alloy steel.

In 2005, it is estimated that the United States fastener industry runs 350 manufacturing plants and employs 40,000 workers. The industry is strongly tied to the production of automobiles, aircraft, appliances, agricultural machinery, commercial construction, and infrastructure. More than 200 billion fasteners are used per year in the U.S., 26 billion of these by the automotive industry.


What is a screw machine?

Screw machines, being the class of automatic lathes for small- to medium-sized parts, are used in the high-volume manufacture of a vast variety of turned components.

Speaking with reference to the normal definition of the term screw machine, all screw machines are fully automated, whether mechanically (via cams) or by CNC (computerized control), which means that once they are set up and started running, they continue running and producing parts with very little human intervention. This has been true since the 1870s. Mechanical automation came first, beginning in the 1870s; computerized control (via first NC and then CNC) came later, beginning in the 1950s.

The name screw machine is somewhat of a misnomer, because screw machines spend much of their time making things that are not screws and that in many cases are not even threaded. However, the archetypal use for which screw machines were named was screw-making.



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