Installing Cable Guide Bottom Bracket
Amazon.com: Shimano SP-18-T Bottom Bracket Cable Guide: Bike Cables And Cable Housings: Sports & Outdoors.
Most newer bicycles use cartridge bottom brackets, which are modular assemblies. These are normally not adjustable or serviceable; rather, they are intended to be replaced as a unit when the bearings become worn out or contaminated. An old-style. The lockring wrench is about to loosen the, the pin wrench is engaging two of the holes in the adjustable cup. (Some cartridge bearings do use these same tools.) Another article gives A bottom bracket. The splined tool is shown above the bottom bracket. The crank would need to be removed to actually use the tool.
This article deals with cartridge bottom brackets, and will provide advice on a number of different brands and models. Cartridge bottom brackets are much cleaner and easier to work on than cup-and-cone bottom brackets -- grease and bearing balls are entirely enclosed inside the sealed cartridge(s). Ps2 Software For Pc Full Version. Our first, guiding example is a Phil Wood bottom bracket.
Phil Wood was the first brand of cartridge bottom bracket, in 1971. Magicbox Dect Phone Manual. It is more expensive than most others, but also has a very long service life -- and the bearings are replaceable at any well-equipped bicycle shop. Unlike most other brands, Phil Wood offers chainline adjustability. Installation is a bit more complicated for this reason. Phil Wood offers options to fit frames with newer outboard-bearing bottom brackets and all common threadings -- British/ISO, but also the older Italian, French, Swiss, Raleigh and Chater Lea threadings.
(I've never even seen that one!) Phil Wood also offers a large variety of axles of different lengths to fit square-taper and splined cranks. Some of the instructions for Phil Wood bottom brackets below are helpful for other brands and models as well. Phil Wood bottom brackets. See Sheldon's for information on dimensions and see the for details of axle lengths.
Chainline can further be adjusted during installation by repositioning the mounting rings. The Phil Wood axle is shoulderless -- press-fit into the bearing cartridges -- and so its offset can be adjusted when the bearings are replaced. If you are not sure of the threading of the bottom bracket shell, measure it with a thread-pitch gauge or by trying to thread in bottom-bracket cups or mounting rings with known threading. The correct size will start and turn easily.
Do not try to force a fit, or you will damage the threading. The right-side of British and Raleigh bottom brackets is threaded counterclockwise. The Phil Wood cartridge dimensioned for a 68 mm bottom bracket works with most bicycles. The Shimano UN-72 cartridge (described later in this article) is narrower than the 68 mm Phil Wood cartridge. Dimensions are as follows: Width between outer faces of bearings of cartridge Width between outer faces of mounting rings mm inch mm inch Phil Wood (custom-made) for 73 mm BB 65 mm 2 9/16' 72 mm 2 13/16' Phil Wood for 68 mm BB 60 mm 2 3/8' 67 mm 2 5/8' Shimano UN 72 57 mm 2 1/4' 64 mm 2 1/2' The cartridges in the image below are, from top to bottom, a Phil Wood cartridge for a 73 mm bottom-bracket shell; newer and older Phil Wood cartridges for a 68 mm shell (also now listed as for a 73-mm shell); and a Shimano UN72 cartridge. The right-side bearing faces are aligned; the difference in length at the left end of the cartridges is clear. If you use a cartridge which is too narrow for the bottom-bracket shell,, the mounting rings may go in too far and run up onto partially-cut threads inside the bottom-bracket shell.