A spring pin is an unthreaded fastener that typically has a slot or coil that contracts and expands to accommodate predrilled and prepunched holes. Slotted spring pins are typically one piece, with a slot on one side that stays stationary once it is installed. Pin The stress in the pin is given by 𝜏=𝐹 2𝐴 for a pin in double shear, where F is R F in the diagram above and A is the cross sectional area of the pin. 𝜏= 𝐹 2𝐴 = 400 2∗𝜋∗0.252 =1019 𝑃 𝑖 This value is very small compared to the ultimate shear of even soft steels, which means the pin. The fit designation ranges from clearance fits to interference fits. This is an intuitive concept to grasp- a clearance fit specifies a fit where there will always be a gap in the joint between the mating shaft and hole. Even at the maximum shaft and minimum hole tolerance, the shaft will be able to freely pass through the mating hole. We manufacture our own product line as well as any blue print or detail you need! Please call us today for any part you may need. We manufacture a wide range of industry standard parts as well as from our own product line. A true zero backlash shaft-to-hub connection with none of the operational drawbacks of keyways or splines. New casino resort in nassau bahamas. The ability to mount on plain shafting, which need not be over-sized to compensate for notch factors. This allows the use of smaller shafts and bearings for more cost effective designs.
Chris Blaszczyk, Manager of Product Development, MISUMI USA
Typically, locating pins are used for controlled, fine tolerance positioning of a work piece. For example, a pallet that is moved along one axis, where the drive mechanism is not accurate and stable enough to place it in a position sufficiently accurate to execute a particular process, the use of locating pins may be the best solution.
Usually two locating pins are enough to properly locate the work piece on one plane.
There are dozens of styles of locating pins that can be utilized in a design. We will explain the structure and show an example of how each style can be applied.
One of the most common pins is a stepped pin with either small or large head.
Diamond Shaped Pin
The Diamond Shape is a critical feature that helps with machining inaccuracies and smoother locating operation. When two round head pins are installed onto one plate, the distance between two mounting holes must be extremely precise and even then, the work piece will not be placed on the base as easily as it would with the use of a diamond shape pin.
There are other ways of utilizing diamond locating pins. This is one example, where you need to perfectly align the center of the part, but the angular orientation is not critical.
Shank mounting styles
One of the locating pin features is a shank--the part of the pin that is installed in the mounting fixture and does not come in contact with the work piece. There are several different shank mounting configurations.
The press fit shank is used, when you have access to the bottom of the mounting plate. This way it can be knocked out when replacement is needed.
Different Pin Head Shapes
There are several styles of Pin Head shapes. They serve different purposes and can be utilized in a variety of applications.
Height Adjustment Pins
Height adjustment Pins use the face of the pin for crating spacing between the product and the pin's mounting surface. The face of the pin usually needs to be hardened.
Locating Pins with Shoulder
Flanged pins are very popular due to their dual functionality. They provide both XY plane as well as Z height location.
Stepped Head Pins (Also known as Double Pilot Pins)
Stepped Head design allows you to position two layers of work pieces as once. Often used when working with multiple pieces of sheet metal.
Head with Air Vent
It is beneficial to add an air vent, often in the form of a flat running along the side of pin's head in order to avoid air compression inside the hole, especially when dealing with blind positioning holes.
Additional useful features
Most of locating pins are machined with an undercut feature that allows for the work piece to rest on the base. Sometimes more structural strength is required and you can design the pin with a radius if the positioning hole can be produced with appropriate chamfer.
A flat feature on the flange can also be used for orientation of the diamond pin. Please see the example below.
Materials
Typically, locating pins are manufactured from hardened tool steel such as O1 heat treated to 60-63Rc or from case hardened carbon steel (1045 with 45-50Rc). In some cases, soft 300 series or hardened 400 stainless is used in assemblies where no rust is accepted. Please, remember that pins made out of soft materials will wear out much faster than harden pins.
There is a variety of coatings that can be chosen based on your application. In corrosive environments, a hard chrome, Dicoat or TiCN coatings can help extend the life of the pin since they provide non-corrosive and hard layer that can be as hard as 3000 Vickers.
A variety of insulating coatings or materials can be used in case of welding applications. KCF stainless steel coat is one surface treatment that provides great insulation and prevents weld build-up between the work piece and the surface of the pin.
As I explained, there are many different features that can be combined in a design of your locating pin. The photograph below represents only some of the combinations of features introduced in this article. Possibilities are virtually endless. To view a complete line of locating pins please consult the MISUMI 2009 metric and inch factory automation catalogs available for order at 'MISUMI USA'
Our pins are made in our shop in Leitchfield, Ky. The size information listed below on our size chart is what we have seen fit these guitars in years past. Contact us for custom sizes and unslotted pins. The unslotted pin is a big thing now and we have alot of people asking if we have them. Thanks Bryan England
Never modify your guitar to make bridge pins fit !
Always get pins that fit your guitar !
Bridge pins are certainly not ' one size fits all '. With this size chart, our aim is to help you get the correct size pins the first time. These pin sizes cover most guitars out there. Of course, there are custom pins, old pins that are no longer made and pins sizes that were used for brief periods. Please contact us with any questions. As always, if you order a set of pins and they do not fit your guitar, we will replace them with the proper size pins. For more discussion, we break the pins down to three parts: the head, the skirt (flared below the head) and the shaft.
Size 1
Shaft Slot Pin Connector
3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft, stopping below the skirt.This size pin will fit Martin guitars prior to 1994 (except HD-28), Collings guitars prior to 2002, as well as Blanchard, Garrison, Goodall, Ryan, Santa Cruz and Taylor guitars.
Fits Larrive D-03R
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3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft through the skirt.
Fits Gibson after November 2009
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Size 1.3
3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.205' and a string slot running the full length of the shaft through the skirt.
Fits Gibson Guitars from later years to 2009, Weissenborn, Huss & Dalton, McPherson,
Washburn, Froggy Bottom, Takamine, Taylor,
Taylor 6C8 2007, Alyare-YARI, Martin D-166T, Guild D-412
NOTE: We have found the size 1.3 fits the newer model Guild guitars.
Shaft Slot Pin Removal Tool
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Different Pin Head Shapes
There are several styles of Pin Head shapes. They serve different purposes and can be utilized in a variety of applications.
Height Adjustment Pins
Height adjustment Pins use the face of the pin for crating spacing between the product and the pin's mounting surface. The face of the pin usually needs to be hardened.
Locating Pins with Shoulder
Flanged pins are very popular due to their dual functionality. They provide both XY plane as well as Z height location.
Stepped Head Pins (Also known as Double Pilot Pins)
Stepped Head design allows you to position two layers of work pieces as once. Often used when working with multiple pieces of sheet metal.
Head with Air Vent
It is beneficial to add an air vent, often in the form of a flat running along the side of pin's head in order to avoid air compression inside the hole, especially when dealing with blind positioning holes.
Additional useful features
Most of locating pins are machined with an undercut feature that allows for the work piece to rest on the base. Sometimes more structural strength is required and you can design the pin with a radius if the positioning hole can be produced with appropriate chamfer.
A flat feature on the flange can also be used for orientation of the diamond pin. Please see the example below.
Materials
Typically, locating pins are manufactured from hardened tool steel such as O1 heat treated to 60-63Rc or from case hardened carbon steel (1045 with 45-50Rc). In some cases, soft 300 series or hardened 400 stainless is used in assemblies where no rust is accepted. Please, remember that pins made out of soft materials will wear out much faster than harden pins.
There is a variety of coatings that can be chosen based on your application. In corrosive environments, a hard chrome, Dicoat or TiCN coatings can help extend the life of the pin since they provide non-corrosive and hard layer that can be as hard as 3000 Vickers.
A variety of insulating coatings or materials can be used in case of welding applications. KCF stainless steel coat is one surface treatment that provides great insulation and prevents weld build-up between the work piece and the surface of the pin.
As I explained, there are many different features that can be combined in a design of your locating pin. The photograph below represents only some of the combinations of features introduced in this article. Possibilities are virtually endless. To view a complete line of locating pins please consult the MISUMI 2009 metric and inch factory automation catalogs available for order at 'MISUMI USA'
Our pins are made in our shop in Leitchfield, Ky. The size information listed below on our size chart is what we have seen fit these guitars in years past. Contact us for custom sizes and unslotted pins. The unslotted pin is a big thing now and we have alot of people asking if we have them. Thanks Bryan England
Never modify your guitar to make bridge pins fit !
Always get pins that fit your guitar !
Bridge pins are certainly not ' one size fits all '. With this size chart, our aim is to help you get the correct size pins the first time. These pin sizes cover most guitars out there. Of course, there are custom pins, old pins that are no longer made and pins sizes that were used for brief periods. Please contact us with any questions. As always, if you order a set of pins and they do not fit your guitar, we will replace them with the proper size pins. For more discussion, we break the pins down to three parts: the head, the skirt (flared below the head) and the shaft.
Size 1
Shaft Slot Pin Connector
3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft, stopping below the skirt.This size pin will fit Martin guitars prior to 1994 (except HD-28), Collings guitars prior to 2002, as well as Blanchard, Garrison, Goodall, Ryan, Santa Cruz and Taylor guitars.
Fits Larrive D-03R
------------------------------------------------------------------------------------------------------------------------
3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft through the skirt.
Fits Gibson after November 2009
------------------------------------------------------------------------------------------------------------------------
Size 1.3
3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.205' and a string slot running the full length of the shaft through the skirt.
Fits Gibson Guitars from later years to 2009, Weissenborn, Huss & Dalton, McPherson,
Washburn, Froggy Bottom, Takamine, Taylor,
Taylor 6C8 2007, Alyare-YARI, Martin D-166T, Guild D-412
NOTE: We have found the size 1.3 fits the newer model Guild guitars.
Shaft Slot Pin Removal Tool
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5 º tapered shaft with the diameter at the top of the shaft (just below the skirt) of 0.220' and a string slot running the full length of the shaft and cutting through the shirt. This size will fit Martin guitars since 1994 and some Old Gibson guitars.
Also, Fits 2007 Martin D-28
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Size 2B
The same as size 2A except the string slot actually stops 1/16' below the bottom of the skirt. This size will fit Martin HD-28 guitars prior to 1994 and
Alyare-5236
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If you own a new Martin guitar, chances are the bridge pins are installed so that the head of the pin sticks up about 1/4' above the bridge. Our Size 2A pins will fit the same way. Size 2C is the same degree of taper but with a reduced shift diameter (0.215' at the top of the shaft) so that they will sit farther down in the bridge.
This size will fit 2010 Martin HD28V.
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Size 4.1 and 4.2
A larger head profile with no skirt make these pins stand out on Dreadnought and Jumbo guitars. Available in Size 4.1 (3 º tapered shaft) and Size 4.2 (5 º tapered shaft). Larrivee guitars use a Size 4.1 slotted pin.
Most frequently hit roulette numbers. ------------------------------------------------------------------------------------------------------------------------
This size will fit Maton EB6808TE, IBANEZ
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Size 4.2C
Beginning in 2002, Collings switched to an unslotted pin with a 5 º taper and a longer shaft length. The shaft diameter is 0.223' (just below the head). Also used on Bourgeois guitars.
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The diameter at the top of the shaft is 0.207' and tapers down to 0.144' with a long (0.945') shaft. The slot runs the full length of the shaft, stopping below the ball. These pins do not have a skirt - just a slight ridge beneath the ball. The slot does penetrate this ridge. This pin size will fit Guild, Yamaha LS400 & Takamine (12 String).
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Shaft Slot Pin Lock
Size 5.1 and 5.2
Shaft Slot Pin Tool
These pins re-create the simple, classic look of the original ivory pins used by Martin in the 20's and 30's. Vintage guitars will use a Size 5.1 with no string slot. Modern guitars, including Vintage Reissues, will use either a slotted (5.1) (3 degree taper, 0.210 below skirt) or slotted (5.2) (5 degree taper, 0.220 below skirt).
If you are unsure of your pin size, you can send us one of your original pins to be matched. We normally send the new set out the same day as we receive your original.