CamLock Washers

2001 - Volume #25, Issue #6, Page #40

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CamLock Washers

Arco Rosenow of Chillicothe, Ill., recently contacted FARM SHOW about a unique product that he discovered and liked so much he started selling it.
    CamLoc Washers are heavy-duty lock washers that come in two pieces. They're designed to maintain adequate tension on bolts and nuts to prevent any loosening due to vibration or shock.
    "The washers aren't impacted by heat, are reusable many times, and seem to incur no fatigue factor due to use," says Rosenow. "The face of the cam is at a different angle than the threads on the bolt. By placing the cam faces together, the lead angle or ramp of the cams is greater than the pitch of the threads on the bolt. When a bolt is at proper torque, the bolt is slightly elongated which keeps the bolt in a tension that will not let it override the cam angle. As a result, it actually requires more torque to loosen the bolt than to tighten it. This is a big benefit when tightening a screw in soft metals like brass or aluminum.
    "I recently installed these lock washers on my chain saw. The muffler screws were set in an aluminum housing and kept coming loose due to vibration. I kept trying to tighten the screws but eventually stripped the threads. After I installed the washers the screws haven't vibrated loose once. Three years ago I installed the washers on the pitman of my sickle mower, and since then the nuts have never loosened on their own. These washers are a little expensive, but they can save a lot of money if they keep a bolt from working loose and going through a combine.
    "There are 18 different sizes available. Prices range from 32 cents to $6.18 apiece. However, the ones that fit most of my needs are 1/4, 5/16, 3/8, 1/2, and 5/8.
    "I sell a sample pack of these five sizes, with one pair per size, for $3.75 including S&H."
    Rosenow also sells locking cotter pins designed to keep tractor drawbar pins in place. The pins install without the need for any tools. A sample pack is available for $3.00 including S&H.
    Contact: FARM SHOW Followup, Arco Rosenow

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CamLock Washers FARM SHOP Parts 25-6-40 Arco Rosenow of Chillicothe, Ill., recently contacted FARM SHOW about a unique product that he discovered and liked so much he started selling it. CamLoc Washers are heavy-duty lock washers that come in two pieces. They're designed to maintain adequate tension on bolts and nuts to prevent any loosening due to vibration or shock. "The washers aren't impacted by heat, are reusable many times, and seem to incur no fatigue factor due to use," says Rosenow. "The face of the cam is at a different angle than the threads on the bolt. By placing the cam faces together, the lead angle or ramp of the cams is greater than the pitch of the threads on the bolt. When a bolt is at proper torque, the bolt is slightly elongated which keeps the bolt in a tension that will not let it override the cam angle. As a result, it actually requires more torque to loosen the bolt than to tighten it. This is a big benefit when tightening a screw in soft metals like brass or aluminum. "I recently installed these lock washers on my chain saw. The muffler screws were set in an aluminum housing and kept coming loose due to vibration. I kept trying to tighten the screws but eventually stripped the threads. After I installed the washers the screws haven't vibrated loose once. Three years ago I installed the washers on the pitman of my sickle mower, and since then the nuts have never loosened on their own. These washers are a little expensive, but they can save a lot of money if they keep a bolt from working loose and going through a combine. "There are 18 different sizes available. Prices range from 32 cents to $6.18 apiece. However, the ones that fit most of my needs are 1/4, 5/16, 3/8, 1/2, and 5/8. "I sell a sample pack of these five sizes, with one pair per size, for $3.75 including S&H." Rosenow also sells locking cotter pins designed to keep tractor drawbar pins in place. The pins install without the need for any tools. A sample pack is available for $3.00 including S&H. Contact: FARM SHOW Followup, Arco Rosenow, 1223 Hallock Hollow, Chillicothe, Ill. 61523 (ph and fax 309 274-2107).

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