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Vancouver Rail. Mono Rail. Signature Rail. If you need more accuracy, you can perform simple testing to obtain the shear strength of the pin. RE: shear capacity of dowels Be sure the material the dowel is pressed into and reacts against across the joint is strong enough to carry those shear forces. We use a lot of gray iron and nodular iron castings. Our dowels are for location only centerlines for shafts and bearings. To carry shear load into the mating material, sometimes the dowel needs to be larger than what its strength capabilities are to make sure the mating material isn't crushed.

I can't immediately see a way to use a dowel effectively in a double shear application. Could you please post a link to the shear strengths? Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

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Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. Home Forums Mechanical Engineers Activities Mechanical engineering general discussion Forum shear capacity of dowels 2. These standards give hardness values but no indication of shear strengths or load capacities.

I have estimated a shear capacity using a formula for hardness vs tensile strength but am not sure how accurate this is? Someone out there correct me if I am wrong but dowel pins are not designed to carry a load.

They are strictly used for locating purposes. The load should be carried by a something else in an assembly, such as bolts or studs. While a dowel pin may be able to physically carry a load there is no reason to publish this information because it is contrary to the design intent of the part.

I am using the dowels to locate two faces which are bolted together. In order to locate, the dowel hole clearance has to be less than the bolt clearance - I think the dowels therefore have to be capable of carrying the shear load on the joint. The result is that the bolts won't "see" any shear load.

If the two parts were assembled without any bolts and only dowels then the dowel would see load, but the bolts are preventing the assembly from moving and therefore carrying any side load. Cheers Greg Locock. We use quite a few gear pumps that are fabricated from D-2 steel that require very close fitting dowels. Greg, Good question. If you have to calculate shear strength of a dowel pin multiply its cross sectional area by shear stress of material.

Thanks for everyone's reply. Be sure the material the dowel is pressed into and reacts against across the joint is strong enough to carry those shear forces. My version of the SPS catalog lists single shear strength. I can't find anything on dowels on the SPS website.

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