Sockets & Ratchets History
Interchangeable sockets, ratchet mechanisms, drive sizes and the Snap-on era.
Why was the oxygen sensor socket invented?
Short answer: Oxygen sensors arrived in the late 1970s and spread through the 1980s to support closed-loop fuel control.
Oxygen sensors arrived in the late 1970s and spread through the 1980s to support closed-loop fuel control. Because the sensor has a wire attached, toolmakers developed deep sockets with a side slot so the wire could pass through during removal.
Why did stud extractor sockets become common in shops?
Short answer: Corrosion often seizes exhaust, wheel and engine studs, making them hard to remove without damaging the threads.
Corrosion often seizes exhaust, wheel and engine studs, making them hard to remove without damaging the threads. Stud extractor sockets, which grip the smooth shank of a stud, became common shop tools for this recurring problem.
Why did socket rails and trays become essential as tool collections grew?
Short answer: Socket rails and trays keep sockets organized by size and drive, making it easy to see when a tool is missing.
Socket rails and trays keep sockets organized by size and drive, making it easy to see when a tool is missing. As professional socket collections grew to include SAE, metric, deep, shallow and impact versions, organized storage became essential for working efficiently.
How did front-wheel drive increase demand for axle nut sockets?
Short answer: As front-wheel-drive cars became widespread from the 1980s onward, technicians routinely removed large axle and hub nuts.
As front-wheel-drive cars became widespread from the 1980s onward, technicians routinely removed large axle and hub nuts. Large axle nut sockets became a standard part of shop tool collections as a result.
Why were thin-wall sockets developed?
Short answer: Thin-wall sockets have a smaller outside diameter so they can fit over fasteners in recesses such as alloy wheel lug holes.
Thin-wall sockets have a smaller outside diameter so they can fit over fasteners in recesses such as alloy wheel lug holes. They became popular as alloy wheels with narrow lug pockets grew common, since a standard socket might not fit or could scratch the wheel.
Why did lug nut sockets with protective sleeves appear?
Short answer: Plastic or nylon sleeves on lug nut sockets protect the finish of alloy wheels.
Plastic or nylon sleeves on lug nut sockets protect the finish of alloy wheels. They became popular as custom and factory alloy wheels grew common, because bare metal sockets can scratch or chip a wheel.
Why did tire shops adopt torque sticks?
Short answer: Torque sticks are extensions designed to flex at a set torque when used with an impact wrench.
Torque sticks are extensions designed to flex at a set torque when used with an impact wrench. Tire shops adopted them to reduce overtightening of lug nuts with impact guns, though final tightening with a calibrated torque wrench remains the recommended practice.
Why did socket drive adapters become common accessories?
Short answer: Technicians often own tools in several drive sizes and need to combine them.
Technicians often own tools in several drive sizes and need to combine them. Drive adapters let a ratchet or extension of one size turn sockets of another, and they became common accessories as multi-drive tool collections grew.
How did pass-through ratchets change socket design?
Short answer: Pass-through ratchets use sockets with an open center so long bolts or studs can pass through.
Pass-through ratchets use sockets with an open center so long bolts or studs can pass through. Several manufacturers have marketed the design since the late twentieth century as a lower-profile alternative to a ratchet and deep socket.
Why did quick-release buttons become common on ratchets?
Short answer: A quick-release button locks a socket onto the drive and releases it with a push.
A quick-release button locks a socket onto the drive and releases it with a push. It reduced the chance of sockets falling off in engine bays and sped up socket changes, so it became a common feature on professional ratchets.
How did air ratchets complement hand ratchets?
Short answer: Air ratchets use compressed air to spin fasteners quickly once they are loose or before final tightening.
Air ratchets use compressed air to spin fasteners quickly once they are loose or before final tightening. Shops adopted them to save time on repetitive tasks like removing covers and brackets, while hand ratchets and torque wrenches remained necessary for breaking loose and final tightening. Follow the manufacturer's safety instructions when using this equipment.
How did socket sets change mechanic productivity?
Short answer: Socket sets let a mechanic use one handle with many interchangeable sockets, extensions and adapters.
Socket sets let a mechanic use one handle with many interchangeable sockets, extensions and adapters. This reduced the number of separate wrenches needed and sped up work in tight engine compartments.
Why did 3/8-inch drive become the most common socket size for cars?
Short answer: The 3/8-inch drive balances strength and compact size, making it suitable for most engine and chassis fasteners on passenger vehicles.
The 3/8-inch drive balances strength and compact size, making it suitable for most engine and chassis fasteners on passenger vehicles. It became the workhorse size in many mechanics' tool boxes.
How did fine-tooth ratchets change automotive work?
Short answer: Ratchets with more teeth need a smaller swing arc to engage the next tooth.
Ratchets with more teeth need a smaller swing arc to engage the next tooth. Fine-tooth designs became popular because they let technicians work in cramped engine bays where handle movement is limited.
What was the purpose of universal joints in socket sets?
Short answer: Socket universal joints let a ratchet turn a socket at an angle.
Socket universal joints let a ratchet turn a socket at an angle. They became common accessories for reaching awkward fasteners around engines and transmissions.
General guidance only. Follow the vehicle and tool manufacturer's procedures, and confirm vehicle coverage on the tool maker's list before buying.