UCFL207
JRZC UCFL207 is a two-bolt diamond flange unit pillow block bearing assembly, precisely integrated from the UC207 spherical outer ring ball bearing
and FL207 diamond flange housing. This product belongs to the UCFL200 series, featuring an innovative diamond flange design that requires only
two mounting bolts for secure fixation.
It is particularly suitable for applications with limited installation space or where mounting along a single
direction is required. The UCFL207 integrates the bearing and housing into a ready-to-install unit, providing customers with a compact, easy-to-install,
high-performance rotating support solution with self-aligning capability
- Dimensions
Attachment bolt diameter 14 mm Shaft diameter 35 mm Housing overall width 32 mm Width, total 44.4 mm Centre distance between bolt holes 130 mm Bearing width, total 42.9 mm PerformanceBasic dynamic load rating 25.5 kN Basic static load rating 15.3 kN Oil Limiting speed 4 300 r/min - Properties
Housing type Flanged Flanged housing type Oval Number of bolt holes for fasteners 2 Fastening bolt hole type Plain Retaining feature, inner ring Set screws Bore type Cylindrical Material, housing Cast iron Material, bearing Bearing steel Coating Without Sealing, bearing Seal and flinger on both sides Sealing type Contact, standard Sealing, unit Optional end cover Lubricant Grease Relubrication hole With Grease fitting With - Weight and Material
Product net weight 1.19 kg
1. What is the sealing structure of UCFL207?
UCFL207 employs a dual sealing structure for reliable protection:
Contact rubber seal: Made of heat-resistant, oil-resistant synthetic rubber (NBR), its lip contacts the inner
ring to effectively prevent grease leakage and contaminant ingress.
Dust cover/oil-throwing ring: Mounted on the inner ring side, the protrusions on the oil-throwing ring generate
an outward airflow when the bearing rotates, further preventing external contaminants and dust from
entering the bearing interior.
This dual-layer sealing structure prevents both internal grease leakage and external contaminant ingress,
making it particularly suitable for humid or dusty environments.
2. What is the recommended tightening torque for the set screw of UCFL207?
According to NSK technical documentation, the recommended torque for the UCFL207 set screw is as follows:
Set screw specification: M8×1
Recommended tightening torque: 16.5 N·m
Use a torque wrench to tighten to the specified torque during installation.
This ensures reliable shaft fixation while preventing screw damage from excessive tightening.
Installation and Maintenance
3. What should be noted when installing UCFL207?
Proper installation is critical. Key steps and precautions are as follows:
Before Installation:
Check shaft flatness; shaft diameter tolerance must meet requirements (recommended h7 or j6 tolerance)
Clean shaft and bearing housing mounting surfaces, removing burrs and contaminants
Apply a thin layer of lubricant to the shaft surface to facilitate installation
Installation Process:
Do not fully tighten the bearing housing mounting bolts initially; allow the outer ring to rotate freely within the housing
Slide the unit onto the shaft and position it as required
After installing the bearing on the opposite end of the same shaft, rotate the shaft several times to allow the bearings
to self-align. Utilize the self-aligning function to compensate for coaxiality errors
Tighten both mounting bolts progressively using a diagonal cross pattern
Use a torque wrench to tighten the set screw on the inner ring to the specified torque (16.5 N·m)
Post-Installation:
Manually rotate the shaft to confirm smooth rotation without binding
Check for abnormal noise or vibration
