30TM11N Bearing 30TM11NC3-UR Ball Bearing 30x75x21mm

30TM11N Bearing Specification:

30TM11N bearing is designed as a deep groove ball bearing.
As for the bearing designation,
d: 30 mm
D: 75 mm
B: 21 mm
Mass: 0.415kg
Material: chrome steel
Seal: rubber seal on 2 sides
Precision: standard ABEC1, P0
Internal Play: standard C0, CN
Working Temperature: -30°C to 120 °C
External Modification: grooved outer ring
Replacements: 30TM11, 30TM11N C3, 30TM11NC3-UR

Maintenance Tips For 30TM11N C3 Bearings:

1. Storage & Handling
Keep 30TM11NC3-UR bearings in original, sealed packaging until just before installation.
Store horizontally in a clean, dry, vibration‑free area (avoid vibration to prevent false brinelling).
Handle with clean, dry, gloved hands; never wash in unapproved solvents unless re‑lubrication is planned.

2. Cleanliness Control
Target assembly area cleanliness: ISO 4406 ≤ 18/16/13 (or as clean as practicable).
Do not unwrap near grinding, welding, or abrasive dust sources.

3. Inspection Before Mounting
Visually check 30TM11N bearing raceways, cage, and seals/shields for nicks, discoloration (overheat), or corrosion.
Gently rotate; it should feel smooth, with no grit or catches.
Confirm correct internal clearance class (Normal, C3, etc.) matches design requirement.

4. 30TM11N Bearing  Mounting Practices
Use correct fits: typically interference on the rotating ring (e.g., shaft fit k5/m5) and a slip or light interference in the stationary housing; confirm with load direction and thermal conditions.
Apply force ONLY to the ring being fitted (press on inner ring for shaft mounting; press on outer ring for housing). Avoid transmitting press load through the balls.
For tighter fits, use controlled induction heating (e.g., 80–110°C; never exceed manufacturer’s maximum, often ~120°C) with temperature probe and even heating.

5. Cleaning In Service
Generally avoid washing bearings in place. If necessary, purge with small amounts of fresh compatible grease while slowly rotating to expel contaminants.