It has a 1/4″ Dr. Finger wrench.
The gear was made with 72 teeth.
Quick spin down and off by hand.
Doesn’t fall short of ANSI standards.
It is very strong and long-lasting.
For sockets that can be quickly spun down and off by hand, this is the best thing.
A small design with a knurled grip surface.
Note that this review only applies after it has been fixed and adjusted, unless it says otherwise in the text.
The PowerBuilt 640501 is the best 1/4 drive example of this type of design. It’s better than BikeMaster and ToolZone, which are both better. Most likely, you will have to go to SK or Snap-On to get a better-looking car.
There are a lot of companies that make this basic design, like 4137com and ATE Pro. There are also companies like Bike Master, True Power, TECKTON and PowerBuilt, as well as Silverline, Tool Connection, Toolzone, and Wilmar. Ratchets with names from PowerBuilt and Power Torque are the only ones that have their names on them.
The “PowerBuilt 640501” has sharp edges where the knurling meets the sides of the finger wheel. This needs to be fixed. All palm ratchets of this design that are being made now have these sharp edges on the outside circumference of the finger wheel (Radius around 0.010-inches). Remove these sharp edges for your hands’ comfort. Sharp edges on a tool can be used once in a while, but not every day. This ratchet can’t be used as “mechanics tools” or “for professional use” unless the sharp edges are cut off. To get rid of the sharp edges, I ground and polished a bevel [about 0.070 x 45 degrees] to cover them up.
Ratchet or non-ratchet selection, the number of teeth in the ratchet, and the speed of the ratchet are the most important things to look for when choosing a Finger Ratchet, Thumbwheel ratchet, speed ratchet, or palm Ratchet. Force is needed to move a ratchet. There are many things to consider when buying a finger driver, like its diameter and how long it is. There are also things to keep in mind, like the shape of the finger wheel and its texture. There must be a good fit between the parts for them to work and keep out dirt and germs. The presence of sharp edges is important for both comfort and safety. It’s important to use high-quality materials to make things that last for a long time. Quality and long-term durability also depend on good work. The ability to apply a limited amount of torque with the tool is important. The amount of work it takes to install and remove a socket is important for how useful it is. In 1/4 square drive, it’s important that the socket doesn’t move when it’s being screwed in. The method of keeping any bit driver that is present must be looked at to see if it is useful. The strength of any markings on the ratchet must be checked. According to what you got, you should check the description of the ratchet to see if it is correct. Note whether the ratchet is ready to be used or needs to be fixed before it can be used. The importance given to these factors depends on the person and the use they are going to make of them.
Some of the most important things about the PowerBuilt 640501 are that it is high-quality and durable. It has a 1/4-inch square drive, 43 teeth, a polished CrV Thumbwheel, black oxide-coated knobs, and socket holders that are black oxide-coated. When you turn the finger wheel, it says “POWERBUILT CrV.” This is unusual, because most devices of this type don’t have this kind of marking at all. Allowable Diameter is up to 1.50-inches. All the way around, it’s 0.984 inches. The finger wheel’s width is 0.443-Inches. Finger wheel: The outside circumference is not beveled, giving it a sharp edge that is hard on the palm. When you get the finger ratchet, it comes with a plastic label and is wrapped in a plastic bag. This way, you know that it is new.
Socket adapters, extensions, screwdriver bits and “spinners” are all things you should already own or be able to get your hands on before buying the PowerBuilt 640501.
The PowerBuilt 640501 is built to last. It’s best for 1/4-inch drive socket applications where an all-metal construction is most convenient, like in automotive applications where contaminants are present.
The PowerBuilt 640501 is made of Chrome Vanadium Steel. There is a black oxide coating on both the 1/4-inch drive post and the knob that turns it. There are good checks on the outside of the finger wheel, which is made of Polished CrV.
The PowerBuilt 640501 has 43 teeth or 8.6-degree rotational increments, and it moves smoothly and doesn’t need a lot of force to work.
The ratchet action is easy to use and doesn’t require a lot of effort to work (16 out of 18 max effort acceptable range). This tool can be used with a “spinner,” like the Cal-Van 104-3, if you need to keep the drive still while ratcheting with this tool.
Use the PowerBuilt with the Cal-Van 109 and the correct adapter to always ratchet, no matter how hard the fastener is. When you connect the PowerBuilt with an adapter, you can connect it to the 1/4 square (f) post of the Cal-Van 109. Then, set both devices to ratchet in the same direction, hold the Cal-finger Van’s wheel with one hand, and tighten or loosen the PowerBuilt (depending on the setting), and the assembly will ratchet on or off any fastener, no matter how hard the fastener resists.
When you use the PowerBuilt 640501 1/4-inch square drive post, the socket will stay in place because it has a spring-loaded ball bearing. A 1/4-inch drive usually has a post that doesn’t move, which isn’t the case with this one. To remove the socket, you should not have to use too much force. There isn’t a quick way to get out of the car.
It moves by twisting a black oxide-coated metal Knob that has raised ridges for grip. There is no setting on this machine that isn’t a ratchet (no center off). It has arrows and the letters “R” and “L” in it, so you can turn it in the right direction.
Make sure you have the adapters to use 5/16 and 1/4 screwdriver bits with the PowerBuilt 640501 to get the job done.
A KD tools 2955 torque wrench is used to measure the force I can apply with my right hand and some discomfort with this modified device. I can apply 20 inch pounds of force with the help of this tool. This tool will probably be used to tighten up fasteners so that another tool can finish tightening them. It will also be used to remove fasteners in close quarters after they have been loosened.
The outside diameter of the finger wheel at its widest point has sharp edges that don’t have a chamfer. This makes it hard on the hands. This and the small diameter make it impossible to apply more than 10 inch-pounds of torque. There are not any sharp edges, so your hands should not be hurt by the checkering at all.
The finger wheel is polished and the socket holder is black oxide-coated, so it should be able to stand up to the oil, grease, gasoline, and brake fluid that is used in cars.
The PowerBuilt 640501 is made up of eight parts that are simple and strong (Thumbwheel, socket holder, Pawl, Pawl shaft, Knob, Knob spring, Knob plunger, and Helical spring holding assembly together). Disassembly isn’t too hard, but it does require some skill and manual dexterity. If you don’t pay attention, you could lose small parts if you aren’t careful. The assembly is run dry (without lubricant).
There are a lot of thumbwheel ratchets that look like the PowerBuilt 640501 design. The only difference is the size of the parts. They care enough to put their name on the finger wheel.
