722500 - Mounting Instructions

722500 – Mounting Instructions

General Mounting Principles

To ensure optimal bearing performance and long service life, follow these guidelines:

Support surface: Ensure the mounting surface is flat and even. Recommended: roughness max. 12.5 μm, flatness IT7.
Heavy loads:
- Support the housing with a stop.
- Drill through-holes in the base flange and use dowel pins for additional support.
Centering ring: The 722500 series can be supplied with a centering spigot (suffix AZ/BZ) at the rear for better positioning.
Bolts:
- Normal loads: use bolts of strength class 8.8.
- Heavy loads: use bolts of strength class 10.9.

Mounting Instructions

Preparation
- Ensure the support surface is clean.
- If shims are used, cover the entire contact area.
- Consider load, vibration, and possible adjustment.
Shaft check
- Clean all contact surfaces.
- Machine the shaft seat to tolerance h9/IT5.
Mounting of intermediate parts
- Install any components to be positioned between two housings on the shaft.
Mounting of sealing rings
- Felt seals: soak with grease before installation.
- Rubber seals: fill the space between sealing lips with grease and insert into groove.
- Through shaft: also install seals in the covers.
Positioning the housings
- Place housings on the support surface.
- Insert bolts and tighten lightly.
Insert the shaft
- Position the shaft so it rests in the housing bores.
Lubrication
- Fill the bearing completely with grease.
- Place the remaining recommended grease (see table 1) in the housing on both sides.
Mounting the bearing in the locating position
- Install the locating ring.
- Clean and lubricate the shaft lightly.
- Slide the adapter sleeve onto the shaft.
Inside wall mounting
- Mount the bearing onto the adapter sleeve, insert the tab washer, tighten the locknut by hand.
- Tighten the locknut according our manual for:
- Self-Aligning Ball Bearings (click the link to open the manual)
- Spherical Roller Bearings (click the link to open the manual)
- Secure by bending one washer tab into the locknut slot.
- If bending is not possible: never loosen the locknut, but tighten it slightly beyond the specified torque.
Outside wall mounting
- Mount the bearing onto the adapter sleeve, tighten the locknut by hand without a tab washer.
- Tighten the locknut according our manual for:
- Self-Aligning Ball Bearings (click the link to open the manual)
- Spherical Roller Bearings (click the link to open the manual)
- Remove the locknut again, install a tab washer, and refit the locknut without moving the bearing further.
- Secure by bending one washer tab into the locknut slot.
- If bending is not possible: never loosen the locknut, but tighten it slightly beyond the specified torque.
Mounting the bearing in the non-locating position
- Repeat the same procedure for the second bearing.
- Ensure it can move axially during operation.
Shaft check
- Verify free shaft rotation without jamming.
- Adjust if necessary.
Finishing
- Fit the cover and tighten the cover bolts with a torque wrench according to the table below:
Final adjustment
- Align housings.
- Tighten base flange bolts with a torque wrench according to the table below:

Table 1

Housing	Cover bolts, tightening torque		Attachment bolts, tightening torque		Grease qty, initial fill
722505	M5	6 Nm	M10	50 Nm	15 g
722506	M5	6 Nm	M10	50 Nm	25 g
722507	M5	6 Nm	M12	80 Nm	35 g
722508	M5	6 Nm	M12	80 Nm	45 g
722509	M6	10 Nm	M12	80 Nm	50 g
722510	M6	10 Nm	M12	80 Nm	50 g
722511	M6	10 Nm	M12	80 Nm	60 g
722512	M6	10 Nm	M12	80 Nm	90 g
722513	M6	10 Nm	M12	80 Nm	120 g
722515	M8	24 Nm	M16	200 Nm	250 g
722516	M8	24 Nm	M16	200 Nm	300 g
722517	M8	24 Nm	M16	200 Nm	350 g
722518	M8	24 Nm	M16	200 Nm	400 g
722520	M8	24 Nm	M20	385 Nm	500 g
722522	M8	24 Nm	M20	385 Nm	650 g