Search results
Results from the WOW.Com Content Network
Galling occurs initially with material transfer from individual grains on a microscopic scale, which become stuck or even diffusion welded to the adjacent surface. This transfer can be enhanced if one or both metals form a thin layer of hard oxides with high coefficients of friction, such as those found on aluminum or stainless steel. As the ...
Pentalobe screw sizes include TS1 (0.8 mm, used on every iPhone starting with the iPhone 4s), TS4 (1.2 mm, used on the MacBook Air and the MacBook Pro with Retina display), and TS5 (1.5 mm, used on the 2009 MacBook Pro battery). The TS designation is ambiguous as it is also used for the Torq-set screw drive.
Thread-locking fluid or threadlocker is a single-component adhesive, applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion. Most thread-locking formulas are methacrylate -based and rely on the electrochemical activity of a metal substrate to cause polymerization of the fluid.
Thread seal tape lubricates, allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed. [1] The tape also works as a deformable filler and thread lubricant, helping to seal the joint without hardening or making it more difficult to tighten, [ 2 ] and instead making it easier to tighten. [ 1 ]
The fundamental way to prevent fretting is to design for no relative motion of the surfaces at the contact. Surface roughness plays an important role as fretting normally occurs by the contact of the asperities of the mating surfaces. Lubricants are often employed to mitigate fretting because they reduce friction and inhibit oxidation.
The iPhone 13 Pro has a 6.06 inch (154 mm) (marketed as 6.1-inch (15 cm)) OLED display with a resolution of 2532 × 1170 pixels (2.9 megapixels) at 460 PPI, while the iPhone 13 Pro Max has a 6.68 inch (170 mm) (marketed as 6.7-inch (17 cm)) OLED display with a resolution of 2778 × 1284 pixels (3.5 megapixels) at 458 PPI. Both models have the ...
The 12 Pro Max also has a 47% larger sensor and sensor-shift stabilization for better low-light photos and more details. The telephoto camera can now zoom up to 2.5x on the Pro Max, albeit with a f/2.2 aperture instead of the 12 Pro's f/2.0 aperture. The iPhone 14 and 14 Pro series introduced Photonic Engine image processing technology. [72]
Pre-orders began on September 13, with the iPhone 11 Pro starting from a base price of $999, and the larger screen Pro Max starting from $1,099. The phones were released on September 20 in the US and other countries, with all releases complete by December 6. [18] The iPhone 11, 11 Pro and the 11 Pro Max made up the 13th generation of iPhones.