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2. Plain bearing - Wikipedia

   en.wikipedia.org/wiki/Plain_bearing

   A flanged bushing is a sleeve bushing with a flange at one end extending radially outward from the OD. The flange is used to positively locate the bushing when it is installed or to provide a thrust bearing surface. [9] Sleeve bearings of inch dimensions are almost exclusively dimensioned using the SAE numbering system.

3. ABEC scale - Wikipedia

   en.wikipedia.org/wiki/ABEC_scale

   Illustration of bearing tolerances (in micrometers) for a bearing with a 20 mm inner diameter. For illustration, the figure shows the differences in tolerance per ABEC class in micrometers (μm) for a 20 mm inner diameter bearing. [1] A 20 mm ABEC 7 bearing only has a 5 μm tolerance window, whereas an ABEC 1 has twice as wide a tolerance.

4. Buttress thread - Wikipedia

   en.wikipedia.org/wiki/Buttress_thread

   In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

5. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   DIN 625-1: Rolling bearings; single row radial contact ball bearings: Active: DIN 625-3: Rolling bearings; double row radial contact ball bearings: Active: DIN 625-4: Rolling bearings; radial contact groove ball bearings with flanged outer ring: Active: DIN 653: Knurled thumb screws, low type: Active: DIN 678-1: Envelopes – Part 1: Sizes ...

6. Bearing (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Bearing_(mechanical)

   A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

7. Go/no-go gauge - Wikipedia

   en.wikipedia.org/wiki/Go/no-go_gauge

   Snap go/no-go gauge for the OD of a cylindrical workpiece Thread snap gauge. Snap gauges are often used when a large quantity of work pieces must be inspected. [4] The snap gauge has four anvils or jaws, the first one or pair (outermost) are set using the upper limit (tolerance) of the part and the inner set adjusted to the lower limit of the ...