The first pressing run of each Blue note title is associated with a particular groove combination, noted by Fred Cohen in his Guide to Blue Note Original Pressings. That schedule was compiled by Cohen in conjunction with elite collectors with extensive first hand knowledge of Blue Note original pressings, through a lifetime of collecting.
Because DG dies continued in use at Plastylite until 1965, there are anomalies where the original pressing is no deep groove, and a subsequent repressing appears with deep groove, merely by chance. Deep Groove is definitive only for releases before 1961, ad even then there were many repressings within the deep groove era.
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Hot vinyl biscuit is sandwiched by labels, and mounted between a side A and side B stamper. Ensuring the labels were bone dry was critical at this point, as any moisture converts to steam during pressing. The press applies 100 tons pressure to the biscuit at a temperature near 200 C for 30 seconds, pressing the grooves from the stamper image into the vinyl. As the press lifts away from the newly pressed record (bottom right) you see the indentation left behind in the central label area by the metal dies holding the stampers in the press. Deep Groove, or not Deep Groove, this is where it all happened.
Deep groove impression is found on many other record labels such as Riverside and Contemporary pressed around this time. There is not as much documented about how these fit into the chronology of other pressing plant processes as there is for Blue Note and the Plastylite vinyl pressing plant. Eight different types of pressing die grooves from late Fifties to early sixties, ranging from Plastylite-like on Contemporary, to deep pudding bowl on Verve
Most all of the titles in the catalogue around 4157 are not deep groove, stretching back two or three years at least. If the plant had all or much of its capacity churning out copies of Sidewinder to keep up with the demand, then it is quite plausible that a box of old DG pressing dies could exceptionally have been brought into service along with mothballed presses. Manufacturing practice is messy, the focus is on getting the job done.
Electric motors, electrical machinery, washing machines, ventilators and electric tools are the preferred application areas of single row deep groove ball bearings. However, in order to facilitate further increases in the efficiency of these motors, machines and tools, the power loss occurring in the bearing arrangements must be reduced. The above-mentioned measures for reducing noise also resulted, for example, in an approximate reduction in friction of 35%, giving the designer a range of application-specific advantages:
In summary, this means that, in addition to their technical advantages, bearing positions with deep groove ball bearings of Generation C are also considerably more economical than bearing arrangements with single row standard deep groove ball bearings. Generation C is available in series 60, 62 and 63.
Corrosion-resistant bearings are suitable where particular requirements for anti-corrosion protection are present. Schaeffler supplies deep groove ball bearings of this type in open and sealed designs.
Due to the larger number of rolling elements, double row deep groove ball bearings can be subjected to greater loads than single row deep groove ball bearings. They can replace two single row deep groove ball bearings if a smaller design envelope width is required.
Deep groove ball bearings are versatile, self-retaining bearings with solid outer rings, inner rings and ball and cage assemblies. These bearings with their simple design, high resistance and low-maintenance, are available in single-row and double-row designs, as well as sealed and unsealed. Due to the manufacturing processes used, open bearings can have turned recesses in the outer ring for seals or shields.
Axial deep groove ball bearings comprise shaft locating washers, housing locating washers and ball and cage assemblies. The bearings are not self-retaining; the ball and cage assembly and bearing washers can therefore be fitted separately. In addition to the series with flat washers, series are also available with spherical housing locating washers for the compensation of static angular misalignment. These designs are normally used in conjunction with seating washers.
Deep groove ball bearings of generation C were specially developed in relation to low noise levels and low frictional torque. They are particularly suitable, for example, for use in electrical machinery, ventilators, washing machines and power tools. Design changes such as improved bearing kinematics, new seals and cages, as well as a refined manufacturing process generate several benefits for the generation C deep groove ball bearings.
NSK manufactures a full range of deep groove ball bearings (DGBBs). These versatile bearings are the most common type and serve a wide variety of industries.
Besides radial loads, the bearings can take axial loads in both directions and offer low frictional torque and high-speed components ideal for applications requiring low noise and vibration.
Deep Groove Ball Bearings are essential components in various types of machinery, designed to enable smooth and efficient operation with little maintenance. These Radial Ball Bearings are characterised by deep raceway grooves on the inner and outer rings. Their simple design allows them to accommodate both radial and axial loads in both directions, versatile for use in a wide range of applications. Deep Groove Radial Ball bearings can withstand high-speed rotations and are available in many designs, sizes, and variants. They are the most commonly used bearing type, serving many industries and applications. Deep Groove Ball Bearings play a crucial role in maintaining smooth and reliable mechanical operations, whether used in electric motors, gearboxes, engines, machine tools, or endless equipment applications. We stock a range of metric and imperial Deep Groove Ball Bearings from world-renowned brands such as SKF, FAG, NSK and Timken. Discover our range of Radial Ball Bearings below.
Ball bearings may be shallow groove or deep groove. The 'groove' is the depth of the raceway into which the balls fit. Deep groove single row ball bearings are also known as Conrad bearings. Deep groove ball bearings can carry higher radial and axial loads than their shallow groove ball bearing counterparts.
GGB seeks out collaborative, long-term relationships with each one of our customers. Our diverse expertise gives us a deep understanding of the challenges you face. When you partner with us early, our GGB engineering team is able to review your assemblies and make sure both the bearing and surrounding components are optimized for performance and cost-effectiveness.
They are commonly used in electric motors and in household appliances, car motors, office machinery, automation control, and garden and household tools. They have deep raceway grooves and their race dimensions are close to the dimensions of the balls that run inside.
Deep groove ball bearings come in many sizes, materials and varieties according to consumer needs, including special industrial uses such as high-temperature applications. High-temperature bearings are made to withstand temperatures up to 350C (660F) and are suitable for machines used in the metals industry or for industrial ovens.
They fall under two designs: there are single-row deep groove ball bearings with a single row ; and there are double-row bearings, which have two rows of bearing balls. They can also be made in different sizes and for different loads according to their application, from miniature ball bearings for light loads and small assemblies to large deep groove ball bearings and heavy load deep groove bearings.
Replacing deep groove ball bearings with plain bearings can offer a range of benefits, including lower cost, less maintenance, greatly reduce noise at low speeds and easier installation. Plain bearing can also have a higher load capacity, simplified assembly, increased longevity, reduced housing dimensions and assembly size and weight.
Deep groove ball bearings are suitable for moderate radial or thrust loads and combined radial/thrust loads. The metric DGB series follows ISO design practices for boundary dimensions, Bore, O.D., width and corner radii. Both metric and inch series bearings are supplied with a two-piece machined brass cage, ball centered in most sizes and land riding in the very large bearings. Unless otherwise specified by the end-user, these extra large ball bearings will automatically be supplied with a C3 clearance for metric bearings and B3 for inch series ball bearings. This is necessary to provide some mounted clearance since these bearings are typically mounted on a shaft with an interference fit.
The tube with a groove cut into it, is not a back end of the adjusting barrel, it is a separate part. I don't see a way to easily remove it, but it does rotate in place. Maybe I should rotate it 180 degrees, so the cable doesn't sink into the groove anymore. OTOH, the groove is so smooth and nicely shaped as if it is a part of the design. Is it, though?
It seems that the groove is not a part of the original design. Here is a picture of an old Shimano RD-M760 from Ebay, showing just a slight indentation on this part nowhere near the depth I have on mine:
I was able to rotate the grooved tube 180 degrees with a flat screwdriver wedged into the groove. I cleaned the area and applied a bit of Crazy Glue around the tube. The shifter cable is now in contact with the unworn part of this tube and excessive friction in the system is gone.
The deep groove bearings can be used for many industrial applications. They are designed and manufactured with cutting-edge technologies and were realized with the experience of the UMBRAGROUP technical staff. 006ab0faaa
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