Custom & Precision Solid Dowel Pins

Solid Dowel Pins

Solid Dowel pins are cylindrical press-fit fasteners that provide precision solutions for a variety of fastening applications. They are used in the same manner as Grooved Pins when highly accurate location is required. Once a dowel pin is inserted into a reamed hole, it is then held in place using radial force. This ensures a secure and lasting hold.

Dowel pins can be measured in millimeters or in inches. This ensures consistency for industrial applications. Dowel pins come in a wide range of materials, including wood, stainless steel, alloy steel, and zinc-plated steel. Dowel pins are manufactured in standard diameters, and can also be made in custom diameters to meet special needs. If you do not find a dowel pin in the size you need, a precision dowel pin can be custom made for you.

Common Uses

Because dowel pins allow two components to be joined together safely and securely, they can be used across a wide variety of industries. They are frequently utilized in furniture making and cabinetry, as they provide a secure join without altering the shape or impacting the frame of the finished piece. Construction and engineering industries similarly rely on dowels to keep machinery in alignment, hold parts together, and finish work. The automotive, aerospace, and manufacturing industries rely on dowel pins to join different components of machines together to ensure a proper alignment. All of these industries require components that are guaranteed to perform and uniform in size.

Precision Dowel Pins

Precision Dowel pins come in many finishes, sizes, and types, allowing them to be used for nearly any fastening need across industries. When precision, ease of use, and efficiency are needed, dowel pins are an excellent and cost-effective choice. Precision dowels pins are the best choice for press fits.

DRIV-LOK’S product engineers provide technical assistance for customers to ensure that precision dowels are manufactured to the appropriate specifications. They also help select the appropriate material and diameter size for the dowel based upon the materials used and depth required.

Custom Dowel Pins

DRIV-LOK offers several types of custom dowel pins, including the following:

  • Grooved Dowel Pins – Grooved dowel pins, also known as fluted dowel pins, have threads along the sides that provide texture. These are commonly used as pivots or locking devices when there is not a high end load in use. These are available in a full range of sizes. To know more click here.
  • Solid Dowel Pins – Solid dowel pins are an alternative to grooved pins, but have straight sides instead of threaded sides. They are commonly used across a range of applications when accuracy is required.
  • Vent Dowel Pins – Vent dowel pins closely resemble solid dowels, with the addition of three helical grooves that run along the diameter. The grooves help to relieve air locks when solid dowels are placed in a round hole.
    Each of these can be custom made in our full range of sizes and materials, ensuring the perfect fit for any application.

Shortest Lead Times on Custom Plain Dowel Pins: How and When You Need Them

Driv-Lok is known for short lead times on custom pins. We haven’t settled on just having the shortest lead time, we continuously look to improve on lead time because in today’s competitive environment, it’s all about time.

We know that customers need to be flexible and respond to their demanding environments to be successful. On average, we manufacture custom Plain Dowel Pins in 15 days.

Why DRIV-LOK

DRIV-LOK is dedicated to providing customized service and delivering only the highest quality custom and precision dowel pins. We have over 70 years of experience in the industry and are widely recognized as a leading manufacturer of American-made press-fit fasteners and joining components. We hold certifications from the ISO that demonstrate that our custom made dowel pins conform to industry standards, and that we follow industry best practices for the highest quality. We have developed a reputation for providing reliable products and engineering custom solutions for our customers.

Because our engineers work directly with clients to ensure that clients get the right project to meet their needs, the quality and integrity of the finished product is assured. Our engineers have a highly comprehensive understanding of the joining and press-fitting process, which enables us to provide our customers with unique products for a full range of needs. We have the capacity to fulfill orders quickly and accurately, and have developed a reputation for ingenuity, dedication and service. Get started today, request a free quote for specific product pricing.

Description

Plain pins are solid cylindrical pins which have a cold drawn finish. Plain pins with diameters up to 1/8″ have a tolerance of +.000/-.001 in. and diameters 1/8″ and over have a tolerance of +.000/-.002 in.Dowels are solid cylindrical pins which have a centerless ground finish with total precision tolerances.

All plain pins and dowels are special-order items. Various materials, diameters, lengths, end configurations, heat treatment, and finishes are available.

DRIV-LOK’S engineering department will work with customers to provide technical assistance.

Function

Plain and dowel pins are held in place by interference created around the entire pin circumference when it is
pressed into a hole. The insertion, holding, and radial forces generated by these pins are very sensitive to hole diameter variation and usually require the use of a reamed hole.

Dimensions


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CAD Diagram


Success stories


Click here for complete specifications

Split & Seamless Hollow Dowels

Split Hollow Dowel is an excellent cost-saving option not widely offered by other manufacturers. As a result of using less material and eliminating reaming and finishing, the Split Hollow Dowel can save you between 30-40%.

  • Excellent retention and ease of assembly – a typical application is where two halves of an assembly are located and bolted together. Also used as spacers or compression limiters
  • Available in a variety of materials, finishes and can be heat treated
  • Can be auto-inserted
  • Style Choices: Straight Gap & Anti-Interlock Gap

Seamless Hollow Dowels are used where a seam is not allowable or desired, such as for custom applications that cannot accept the split format.

  • Typically used as locators, spacers or standoff
  • Available in a variety of materials and finishes
  • Can be heat treated
  • Can be auto-inserted

Description

DRIV-LOK’s split hollow dowels are designed and manufactured to provide excellent retention forces and ease of assembly. They can also be auto-inserted.

Split hollow dowels are ideal for use in conjunction with bolts that pass through the center of the dowel after it has been installed. This offers a weight savings over conventional locating dowels, which require separate drilled and reamed holes. The expense and labor involved in providing separate locating dowels and their holes in
assemblies is eliminated. The bolt hole is counterbored on both halves of the assembly. The dowel is then installed into one of the counterbores and used to locate the other half of the assembly. “Split” hollow dowels offer additional cost savings over hollow dowels machined from tube or bar stock.

Function

A DRIV-LOK split hollow dowel is also used as a Compression Limiter to protect plastic from being crushed or yielding past its elastic limit. When properly designed the bolt head or washer will allow proper seating of the bolt to hold the component in place and the compression limiter will absorb the clamping pressure.

Another application of a DRIV-LOK split hollow dowel is when used as a spacer or standoff to space components apart from one another. They have been used over shafts or bolts to give a set distance between component assemblies.

Dimensions


dime-6

CAD Diagram


Success stories


SITUATION

A leading automotive manufacturer requested engineering assistance from Driv-Lok to solve an assembly problem on one of their transmission lines. The problem was defined as an occasional mis-feed of threaded fasteners during the assembly of a wear plate to the housing. The mis-feed caused the fasteners to fall into the gears and cause failure of the entire assembly. The threaded fastener’s only function was to hold the wear plate to the housing so it could be inverted for assembly completion.

SOLUTION

This application was already using Driv-Lok split hollow dowel pins as a partial holding system. Driv-Lok’s ENGINOMICS team reviewed the situation and added a locking feature to the center of the split hollow dowel, which held the wear plate in place. This feature was then patented under patent #US 7,241,095 B2. This upgrade eliminated the use of the threaded fastener, provided the customer with cost savings, solved the problem, and prevented future defects.

ADVANTAGES

  • IMPROVED ASSEMBLY METHODS
  • REDUCED COSTS OF OVERALL ASSEMBLY
  • ELIMINATION OF ASSEMBLY PROBLEM
  • REDUCED NUMBER OF THREADED FASTENERS REQUIRED

Click here for complete specifications

Slotted & Coiled Spring Pins

Slotted & Coiled Spring or hollow pins are economical, universally used shear-type fasteners that are self-locking. They’re manufactured to an oversize dimension so that when the pin is inserted into a hole, radial forces are exerted that hold the spring pin in place.

  • Common uses include dowels, spacers, stop pins and hinge pins in thousands of demanding, non-precision industrial applications
  • Wide range of standard sizes
  • Standard zinc or light oil finish – other finishes also available
  • Made by progressive roll forming flat strips of carbon steel or heat-treatable
    420 stainless steel
  • Style Choices:
    Slotted: Conventional & Type A Notched;
    Coiled: Light Duty, Standard Duty & Heavy Duty

Description

Tubular slotted spring pins are manufactured by progressive roll forming flat strips of high carbon steel or heat treatable 420 stainless steel. After forming, the pins are deburred to remove sharp edges, then heat treated to a spring temper. High-carbon (1070-1095) steel spring pins are hardened to Rc 46-53 and 420 stainless steel spring pins are hardened to Rc 43-52.

Function

Spring pins are manufactured to an oversize dimension so that when the pin is inserted into a hole, radial forces are generated against the hole wall holding the spring pin securely in place.

Dimensions


dime-2

CAD Diagram


Success stories


Click here for complete specifications

Minimum double shear values (lbs.) of Driv-Lok pins of various

Grooved pins

Slotted spring pins

Pin diameter

Low carbon

Shear-proof alloy steel (RC 40-48)

Corrosion resistant steel

Brass

1074 steel
and 420 SS

1/16

410

720

540

250

430

3/32

890

1,600

1,240

560

1,150

1/8

1,600

2,820

2,200

990

1,875

5/32

2,300

4,520

3,310

1,540

2,750

3/16

3,310

6,400

4,760

2,200

4,150

7/32

4,510

8,770

6,480

3,020

5,850

1/4

5,880

11,500

8,460

3,950

7,050

5/16

7,660

17,900

12,700

6,170

10,800

3/8

11,000

26,000

18,200

9,050

16,300

7/16

15,000

35,200

24,800

12,100

19,800

1/2

19,600

46,000

32,400

15,800

27,100

Barb-Lok & Ferrol Pins & Studs

DRIV-LOK BARB & Ferrol pin and stud designs have been used for more than 15 years with no failures recorded in the field.

BARB-LOK and Ferrol pins & studs provide positive fastening and replacement of conventional screws, barbed nails and other fasteners.

  • Use these in plastic applications and some metals
  • Made from low-carbon steel or aluminum and zinc plated with other finishes available
  • Pins are made to order, available with barbs on one or both ends
  • Studs are available in a wide range of dimensions and can also be ordered to specifications
  • Style Choices:
    Pin: Type 1 & Type 2;
    Stud: Flat Head & Round Head

Description

The barbs are located at 120° intervals on the diameter of the pin. The number of barbs along the length of the pin, and the distance between the barbs are determined by pin diameter and customer requirements. The crests of the barbs constitute the expanded diameter. The expanded diameter of the barbed pin is measured on the second barb from the end of the pin and is measured with a ring gage.

BARB-LOK Pins and Studs are made from low carbon steel or aluminum. Low carbon BARB-LOK Pins and Studs are zinc platedfor corrosion resistance. Other finishes are available upon request.

Function

Barbed pin holding power is affected by the pin diameter relative to the hole diameter and material hardness. The recommended hole size for most soft plastic applications is .001 to .005 below the nominal pin diameter. Hole sizes for hard plastic and aluminum applications should be greater than the nominal pin diameter. Specific hole sizes should be determined for each individual application. Ideal product for tamper-resistant applications.

Dimensions


dime-5

CAD Diagram


Success stories


SITUATION

A major manufacturer of infant car seats required a more reliable
method of holding the armrest onto the seat. Their former method
was to use a standard screw to fasten the armrest in place. The
movement of the armrest up and down would loosen the screw.
They needed a method that would hold the armrest fi rmly in place,
while still allowing it to rotate as designed.

SOLUTION

Through our ENGINOMICS ®, Driv-Lok Inc. identifi ed a solution to
the problem by using an engineered Ferrol Stud. Ferrols around the
circumference of the pin are designed so the plastic fl ows over
them when the pin is inserted. The ferrols then lock into the plastic,
making removal of the pin virtually impossible. This allows the arm
to rotate freely while maintaining the required tight fit.

ADVANTAGES

  • EASE OF ASSEMBLY
  • IMPROVES ASSEMBLY JOINT
  • TAMPER-PROOF DESIGN
  • MULTI-FUNCTIONAL DESIGN

Click here for complete specifications

Knurled Pins & Studs

Knurled Pins are similar to grooved pins that have serrations around the diameter. However, knurled pins feature many more serrations. They are press fit fasteners that, when compressed into a hole, extrude radial forces to hold the fastener in place.

  • The best fastener for die casting and plastic application; superior fastening in the assembly of components which have thin cross sections and for formed sheet metal hinges
  • Available with straight, helical or diamond knurling
  • All knurled pins are special order
  • Various diameters, lengths and end
    configurations available
  • Style Choices: Straight, Diamond & Helical

Description

Knurled pins are similar to grooved pins because they have serration around the nominal diameter of the pin. The knurled pin differs from the grooved pin while there are many serrations on a knurled pin. Also, knurled pins are typically roll formed whereas grooved pins are swaged. A knurled section may have either a straight knurl, a helical knurl, or a diamond knurl configuration.

Knurled pins are available with nominal diameters from 3/32″ through 3/8″ and lengths from 3/16″ through 3″.

Function

The serrations on a knurled pin, when compressed by insertion into a hole, result in forces which hold the fastener in place. Radial forces are more evenly distributed around the diameter of a hole for knurled pins than for grooved pins. This is because a knurled pin has more points of contact with a hole than a grooved
pin. The teeth may broach the mating hole when the material is softer and more ductile than the pin material.

The amount of expansion is predicated on the knurl pitch. Coarse knurls provide greater expansion than fine knurls. A knurled pin should have a minimum of 15 teeth to allow proper feed and rolling capability. The number of teeth must be a whole number to allow for proper tracking and avoid slivering. The capability on expanded diameter tolerance is +/-.002. Call for assistance in determining proper knurl pitch for your applications.

Dimensions


dime-1

CAD Diagram


dia-1

Success stories


SITUATION

A customer was looking for a way to fasten an aluminum extrusion to an aluminum end plate for use in a lighting
application.

SOLUTION

Driv-Lok’s ENGINOMICS® team designed and produced a fastener that combined two of our technologies- a Knurl on one end and a Barb-Lok on the other. This allowed the customer to easily install the plate onto the extrusion,
securely holding it in place while using only one type of fastener.The new fastener also eliminated the need for
expensive driving equipment, saving the customer money.

ADVANTAGES

  • Two-way design resists pullout
  • Increases speed of assembly
  • Reduces boss fractures
  • Eliminates expensive driving equipment

Click here for complete specifications

Grooved Pins & Studs

Grooved pins are non-threaded press fit fasteners — a fastener that is pressed into an appropriate sized hole, providing the proper interference fit to lock the fastener in place.

  • Commonly used as locking devices, pivots, bearing faces or locating elements where there is not a high degree of end load
  • Available with many different groove types
  • Typically zinc-plated, made from unhardened, low-carbon steel – but available in a wide range of finishes and heat treatments for shear resistance
  • Wide range of diameters, lengths and end configurations available

Shortest Lead Times on Custom Grooved Pins: How and When You Need Them

Driv-Lok is known for short lead times on custom pins. We haven’t settled on just having the shortest lead time, we continuously look to improve on lead time because in today’s competitive environment, it’s all about time and every day counts.

We know that customers need to be flexible and respond to their demanding environments to be successful. On average, we manufacture custom Grooved Pins in 15 days, and we aren’t going to stop there. Need Driv-Lok Grooved Pins in standard sizes immediately? We have partnered with Stocking Distributors that have immediate delivery.

Description

The groove of a grooved pin is formed by a swaging operation in which three tools penetrate the nominal diameter of the metal at 120° intervals. This penetration displaces a controlled amount of metal to each side of the grooving tool, forming a raised portion along the side of each groove.

The crest of these raised portions forms the expanded diameter or “Dx” dimension which is shown in Figure 1. The Dx is a few thousandths larger than the nominal diameter “D” of the pin. The amount of expansion varies with the diameter of the pin, the material being grooved, and the style of groove.

Function

When a grooved pin is used, the hole into which the pin is to be inserted is drilled a few thousandths larger than the nominal diameter of the pin. The hole must never be smaller than the nominal diameter of the pin. (See Grooved Pin Drilling Procedures and Hole Tolerances on page 4.)When the expanded portion of the pin is compressed by insertion into the hole, radial holding forces are generated as shown in Figure 2. These radial forces lock the pin securely into the drilled hole.

Dimensions


dime-4

CAD Diagram


Success stories


SITUATION

A heavy equipment manufacturer using a threaded fastener was experiencing loosening of the joint due to vibration in a hinged joint application. in addition, their current assembly method was extremely slow and ineffi cient.

SOLUTION

The Driv-Lok Inc. ENGINOMICS ® team introduced a Type “E” Groove Pin to the design. This pin eliminateD the loosening that the threaded fastener experienced. The team also designed an insertion press to install the pin. This press holds multiple pieces in place, hands free, while the pin is inserted into the application. The design
is such that the pin is installed to the same depth every time. The end result was a complete system to solve both the fastening and installation problems.

ADVANTAGES

  • HIGHLY EFFICIENT, HANDS-FREE ASSEMBLY METHOD
  • COST EFFECTIVE ASSEMBLY FUNCTION
  • LOWER INSTALLATION COSTS
  • ONE SOURCE FOR FASTENERS AND INSTALLATION

Click here for complete specifications

 

Grooved pin diameter / shaft size /
torque relationships.

 

This table is a guide in selecting the proper-size DRIV-LOK Grooved Pin to use for fastening machine members to shafts of given sizes and for specific load requirements. Torque and horsepower ratings are based on pins made of cold finished, low carbon steel and a safety factor of 8 is assumed.

Recommended pin diameter for various shaft sizes
and torque transmitted by pin in double shear

Shaft size

Pin diameter

Torque inch lbs.

H.P. at 100 R.P.M.

3/16

1/16

4.8

.007

7/32

5/64

8.5

.013

1/4

3/32

13.9

.022

5/16

7/64

23.8

.038

3/8

1/8

37.5

.060

7/16

5/32

62.9

.100

1/2

5/32

71.9

.114

9/16

3/16

116.4

.185

11/16

7/32

193.8

.307

3/4

1/4

275.6

.437

13/16

1/4

298.6

.474

7/8

1/4

322

.510

15/16

15/16

449

.712

1

15/16

479

.759

1 1/16

15/16

509

.807

1 1/8

3/8

773

1.23

1 3/16

3/8

816

1.30

1 1/4

3/8

859

1.36

1 5/16

7/16

1230

1.95

1 3/8

7/16

1289

2.05

1 7/16

7/16

1348

2.14

1 1/2

1/2

1838

2.92

Minimum double shear values (lbs.) of Driv-Lok pins of various

Grooved pins

Slotted spring pins

Pin diameter

Low carbon

Shear-proof alloy steel (RC 40-48)

Corrosion resistant steel

Brass

1074 steel
and 420 SS

1/16

410

720

540

250

430

3/32

890

1,600

1,240

560

1,150

1/8

1,600

2,820

2,200

990

1,875

5/32

2,300

4,520

3,310

1,540

2,750

3/16

3,310

6,400

4,760

2,200

4,150

7/32

4,510

8,770

6,480

3,020

5,850

1/4

5,880

11,500

8,460

3,950

7,050

5/16

7,660

17,900

12,700

6,170

10,800

3/8

11,000

26,000

18,200

9,050

16,300

7/16

15,000

35,200

24,800

12,100

19,800

1/2

19,600

46,000

32,400

15,800

27,100