I have some new SKF bearings here and I have been puzzling over the reference numbers....... ....not the basics, but the odd digit or letter within the reference number...... EG: 6005 2RSH / C3 and 6005 2RS1 / C3.......... I know the 6005 is the bearing size; the 2 is the number of seals; and the RS is rubber seal; C3 is the clearance (for higher temperature)........but what the H and the 1 are for I couldn't figure out. As far as I can ascertain from various bearing suppliers, the bearings are the same thing....... .....but I'll be damned if I will take that as read.........after all, SKF wouldn't give two numbers for the same thing unless one number / letter had been discontinued.......... ....so after much searching on the SKF website, I found the following table which might be useful..... Well, I will post it when I can get to read right.........
Wow you must have been bored. Still a very useful information bulletin that you have provided. Well done.
Not bored, but determined.......... Anyway, it seems that the simple answer to those odd digits on the commonly used bearings is that the 'H' is a better seal than the '1' seal.
According to my SKF catalogue, 2RS1 means that its a rubbing seal of synthetic rubber with steel reinforcement at both sides of the bearing. The H is a bit of mystery, it apparently denotes Heavy, but I don’t know what it refers to perhaps the cage type, perhaps heavy duty seals? If I come across it I'll update this post.
BTW, the Z shown in the table denotes a Non Rubbing Seal, usual made from steel although this is not actually stated. RZ is a Low friction seal of synthetic rubber with sheet steel reinforcement.
