Take-up ball bearing units, consisting of an insert bearing based on a sealed deep groove ball bearing mounted in a grey cast iron housing. Typically mounted in take-up frames, the unit has an inner ring extended on both sides and is locked by tightening a (set) screw on the inner ring, which makes it easy to mount.
| Compliance with standard |
JIS
|
| Purpose specific |
For material handling applications
|
| Material, housing |
Cast iron
|
| Sealing, bearing |
Seal and flinger on both sides
|
| Sealing type, bearing |
Contact, standard
|
| Sealing, unit |
Without
|
| Coating |
Without
|
| d |
20 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 28.2 mm
|
Shoulder diameter of inner ring |
| A |
34 mm
|
Overall width |
| A1 |
12 mm
|
Width of piloting groove |
| A2 |
25 mm
|
Width of flange in which piloting grooves are provided |
| B |
31 mm
|
Width of inner ring |
| B4 |
4.5 mm
|
Distance from locking device side face to thread centre |
| H |
92 mm
|
Overall height |
| H1 |
76 mm
|
Distance between bottoms of piloting grooves |
| H2 |
54 mm
|
Height of attachment end |
| L |
97 mm
|
Overall length |
| L1 |
62 mm
|
Distance from attachment end face to centre line of spherical seat diameter |
| L2 |
10 mm
|
Length attachment end |
| L3 |
54 mm
|
Length of piloting groove |
| N |
19 mm
|
Diameter of attachment bolt hole |
| N1 |
16 mm
|
Length of attachment slot |
| N2 |
32 mm
|
Height of attachment slot |
| s1 |
18.3 mm
|
Distance from locking device side face to raceway centre |
| RG |
1/4-28 UNF
|
Housing thread for the grease fitting |
|---|---|---|
| R1 |
2.5 mm
|
Axial position of the housing thread |
| Rα |
30 °
|
Angular position of the housing thread |
| DN |
6.5 mm
|
Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
7 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/4-28 SAE-LT
|
Thread of grease fitting |
| Basic dynamic load rating | C |
12.7 kN
|
|---|---|---|
| Basic static load rating | C0 |
6.55 kN
|
| Fatigue load limit | Pu |
0.28 kN
|
| Limiting speed |
8 500 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.9 kg
|
| Set screw | G2 |
M6x0.75
|
|---|---|---|
| Hexagonal key size for set screw |
3 mm
|
|
| Recommended tightening torque for set screw |
4 N·m
|
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