Home Depot has
12-Piece RYOBI 2" Diamond Grit Driving Set (A961204) on sale for
$5.97.
Shipping is free, otherwise select free store pickup where available.
Thanks to Community Member
SUCHaDEAL for sharing this deal.
- Note: Availability for pickup may vary by location.
Details:
- Diamond-coated impact bits: Provide 20× longer life, 2× stronger grip, improved fitment, and reduced stripping
- Torsion zone: Absorbs high torque in demanding applications to extend bit life
- Impact-rated: 1/4" hex shank for use with impact drivers and drills
- Diamond grit benefits: Hardens tip for durability, holds fasteners securely for pre-driving control, enhances fit to minimize stripped screws
- Included bits:
- Diamond: (1) PH1, (2) PH2, (1) PH3, (1) T25, (1) SQ2
- Standard: (1) T20, (2) T25, (1) SL8, (1) SL10, (1) SQ2
- Storage case: LINK Wall Rail compatible, reversible belt clip for mobile carry, quick bit removal/replacement on bar, clear lid for easy identification
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Top Comments
(1) PH1, (2) PH2, (1) PH3, (1) T25, (1) SQ2
While 6 do not:
(1) T20, (2) T25, (1) SL8, (1) SL10, (1) SQ2
23 Comments
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From Wikipedia and its source:
The design is often criticized for its tendency to cam out at lower torque levels than other "cross head" designs. There has long been a popular belief that this was a deliberate feature of the design, to assemble aluminium aircraft without overtightening the fasteners.[15]: 85 [16] There is no good evidence for this suggestion, and the property is not mentioned in the original patents.[17]
2.1.1.1 Cam-Out Claim
Phillips additionally claims that his geometry is such that any foreign particles
found in the recess of the screw will be dislodged by a camming or wedging
action. This camming action is a result of the bit and screw's angular planes
approaching one another with respect to any particle lodged in the recess.
Phillips claims a simple downward thrust of the bit into to the screw will create
this camming force. It is important to note that this camming action claimed by Phillips is not the same as the phrase "cam-out" that is used by industry and cited by Bailey in his September 15, 1988 article. In a later patent "Hy-Torque Drive Tool" [Cummaro] "cam-out" is referred to as "throw-out". In modern terminology, "cam-out" refers to the separation of the bit and screw that can occur when torque is applied to a driver. "Cam-out" is further defined in sections 1.3 and 5.4.1 of this thesis.
2.2 Cam-Out
Bailey, a columnist for the Wall Street Journal, said that Phillips bits are one of
the worlds least loved inventions because of their tendency to slip out of the
screw recess while attempting to drive the screw [Bailey]. This "cam-out", as it is
referred to in industry, was not a result of an innocent design flaw claims Bailey.
According to Bailey, Phillips designed the bit so that when used in automated
assembly lines the bits would pop out, he claims the bit was designed to "cam-
out". However by reviewing Phillips's patents, this does not appear to be the
case. Unfortunately, Phillips's claim of a camming or wedging action to dislodge
foreign particles found in the screw recess has created confusion. Phillips's
claim of camming out or crowding out of substances found in the screw recess
[Phillips 2,046,837] has nothing to do with the term "cam-out" as Bailey and
industry uses it today.
https://en.wikipedia.or
https://vtechworks.lib.
If these save me having to dig out a badly stripped screw because someone was overly enthusiastic driving a PH2 screw with a PH1 bit in their drill...I'll take it. Personally, I'd just use the right bit and not bother since these will quickly tear up a screw head if they do slip.
From Wikipedia and its source:
The design is often criticized for its tendency to cam out at lower torque levels than other "cross head" designs. There has long been a popular belief that this was a deliberate feature of the design, to assemble aluminium aircraft without overtightening the fasteners.[15]: 85 [16] There is no good evidence for this suggestion, and the property is not mentioned in the original patents.[17]
2.1.1.1 Cam-Out Claim
Phillips additionally claims that his geometry is such that any foreign particles
found in the recess of the screw will be dislodged by a camming or wedging
action. This camming action is a result of the bit and screw's angular planes
approaching one another with respect to any particle lodged in the recess.
Phillips claims a simple downward thrust of the bit into to the screw will create
this camming force. It is important to note that this camming action claimed by Phillips is not the same as the phrase "cam-out" that is used by industry and cited by Bailey in his September 15, 1988 article. In a later patent "Hy-Torque Drive Tool" [Cummaro] "cam-out" is referred to as "throw-out". In modern terminology, "cam-out" refers to the separation of the bit and screw that can occur when torque is applied to a driver. "Cam-out" is further defined in sections 1.3 and 5.4.1 of this thesis.
2.2 Cam-Out
Bailey, a columnist for the Wall Street Journal, said that Phillips bits are one of
the worlds least loved inventions because of their tendency to slip out of the
screw recess while attempting to drive the screw [Bailey]. This "cam-out", as it is
referred to in industry, was not a result of an innocent design flaw claims Bailey.
According to Bailey, Phillips designed the bit so that when used in automated
assembly lines the bits would pop out, he claims the bit was designed to "cam-
out". However by reviewing Phillips's patents, this does not appear to be the
case. Unfortunately, Phillips's claim of a camming or wedging action to dislodge
foreign particles found in the screw recess has created confusion. Phillips's
claim of camming out or crowding out of substances found in the screw recess
[Phillips 2,046,837] has nothing to do with the term "cam-out" as Bailey and
industry uses it today.
https://en.wikipedia.or
https://vtechworks.lib.
Videos I watched for reference
https://www.youtube.com/watch?v=R...ivu
https://www.ifixit.com/News/9903/...e-phillips
https://www.instagram.c
Videos I watched for reference
https://www.youtube.com/watch?v=R...ivu
https://www.ifixit.com/News/9903/...e-phillips
https://www.instagram.c
The youtube video mentions the ability to cam out, but only after a long discussion on its development and introduction. It is not cited as a design feature.
The other two links just offer claims without real support.
From one of the patents, no mention of intentional cam-out.
https://patents.google.
The present invention comprises a screw of any of the well-known conventional types, such as fiat head, round head, filister head, oval filister head, and the like. The head of the screw, regardless of its shape or size, is formed with a tool-receiving recess of an especially designed configuration substantially the same as that shown and described in the aforesaid allowed patent application. This recess is formed within precision limits of manufacture to co-operatively receive a tool formed at one end of its ends with a bit formed somewhat similar to that shown and described in the aforesaid allowed screw driver patent application. The tool is also precisely constructed at one of its ends into a bit formed with certain angular faces arranged in definite relation to certain angular portions of the recess to cause a firm wedging engagement between the bit and the recess when the two are brought together. The results of such a union are obviously highly advantageous in presenting screws to be driven, either by hand or by power-driven types of tool, to work to be dealt with, especially in placesdifiicult to approach, that is to say, in places where neither hand of the operator can be placed. In applying screws of. the slotted type to work in any location, both hands of the operator must be applied, one to guide the screw, and then to stabilize the screw during its advancement, and then to further stabilize the driver in a central position with respect to the screw.
The screw and driver shown and described in the aforesaid allowed patent applications, comprise a tool-receiving recess formed in the screw.
head and a tool formed at its working end with a bit made to fit precisely the recess in the screw. In other words, the precision limits of manufacture of the recess are identical with those of the correspondingly shaped end of the driver, so that a perfect fit between the two without binding or wedging is accomplished.
In contrast to these structural characteristics, of identical form, the elements constituting my present form of composite invention are constructed along complementary angular lines to effect a positive wedging engagement when the screw and driver are joined together in operative relation, instead of the driver merely occupying 5 the space defined by the recess as is the case in the aforesaid separate screw and driver inventions.
Such failure of the slotted screw to retain the blade-driver, especially in power driven operations, is not only dangerous to the operator, but is likewise, always injurious to the work, especially in the construction of furniture and other types of work wherein the elements to which the screws are being applied become badly mutilated 5 when the power driver leaves the slot, usually during high speed operation of the driver which is most diflicult to stop in time to prevent injury to the work.
Accordingly, therefore, the principal object of my invention is to overcome all of the foregoing objectionable features in the operation of. a screw by a driver, by providing a composite structure as aforesaid, wherein a screw may be first secured to the end of a driver, and presented to the work to be dealt with without the inconvenience of the screw dropping from the end of the driver. The screw is also centralized with respect to the driver, not only during its starting operation but also throughout its entire advancement, and during such advancement, the driver is locked in its proper centralized working relation with the screw, and any danger of its leaving the screw is thus entirely eliminated. Another object of the invention is the particular angular formation of the walls of the recess in the screw with respect to the angular formation of the working end or bit of the driver to establish a wedging engagement between the two when united. This same angular formation of both elements is especially designed to also create what might be termed a camming action during the approach of these angular faces toward one another with respect to any substances which might have become lodged within the recess of the screw. It has been found by experiment that a downward thrust of the bit into the recess will instantly dislodge any substance within the recess by causing it to move upwardly and outwardly over the walls of the recess.
Still another object of the invention is the provision of angular faces in such relation to each other that the wedging engagement may be obtained by the mere gravitation of the driver and the operators hand applied to it. The angular faces, in other words, are so related to each other that even a slight downward thrust of the driver into the recess will cause a firm wedged engagement between the two elements.
Another feature of the invention is that the same gripping relation, as aforesaid, may be accomplished in screws which are provided with recesses having any number of grooves, whether diametrically opposed or not, to receive in wedged engagement, drivers with a corresponding number of vanes. I also wish to point out that my invention provides means in the grooves which are diametrically opposed, to receive the ordinary fiat blade-driver such as is now comJnonly known and used. These blade-drivers may-or may not be tapered at their lowermost ends for operative engagement with said grooves. This particular feature enhances the utility of the screw by reason of the fact that any blade-driver may also be used to actuate the screw.
A still further object of the invention accomplished by this specific angular relation between the driver and the screw is that only two sizes of my improved form of driver are needed to fit all types of screws in sizes ranging from number 5 to 16 inclusive, instead of six or more sizes of the slotted drivers required to fit the same range of sizes of slotted screws.
Moreover, by reason of the perfect fit between the driver and the screw, the screws may be driven and removed innumerable times without the slightest indication of mutilation to the head. This highly desirable feature is made possible by the firm contact of all the angular faces of the driver into the corresponding angular faces of the recess formed at many difierent equidistant points around the longitudinal center line of both the screw and the driver. Thus, is provided many times as much gripping area as is provided in the slotted screw. This obviously, gives greatly increased strength and torsion with the result that my screws can be driven into material which slotted-head screws could not be made to penetrate.
https://softhandtech.co
https://toolsadvisers.c
https://www.oregonencyc
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