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Timing pulley bar stock, regardless of pitch, will follow the same part numbering principles as the pulleys that we have already discussed in Class 1 and Class 2. Although there may be some variance based on the system of measurement used, the part numbers will be arranged in the same format.
These part number are comprised of 5 coded sections:
1. (20) 2. (XL) 3. (PS) 4. (8) 5. (S)
1. (40) 2. (T5) 3. (PS) 4. (160) 5. (A)
Can be 1-3 digits in length, and will always be a direct reflection of the number of teeth on the pulley bar stock.
Pitch refers to the distance from the center of a pulley tooth to the center of the next tooth. Codes are the same as their finished pulley counterparts.
MP/MXL = .080″ pitch
LT (40 DP) = .0816″ pitch
XL = .200″ pitch
L = .375″ pitch
H = .500″ pitch
XH = .875″ pitch
2P/2MR = 2mm PowerGrip GT
3P/3MR = 3mm PowerGrip GT
5P/5MR/5MGT = 5mm PowerGrip GT
3M = 3mm HTD
5M = 5mm HTD
8M = 8mm HTD
This code indicates the item is a full bar of toothed pulley stock.
This code will indicate the length of the toothed area of bar stock. This may be in inches or millimeters.
This section of code will indicate the material used to make the bar stock. The codes are identical to the finished pulley codes:
A = Aluminum
S = Steel
Seldom used codes:
P = Plastic
SS = Stainless Steel