Bearing sleeve - H205 ZKL

Product detailed description

ZKL H205 is a steel adapter sleeve for mounting a tapered-bore bearing on a cylindrical shaft. It is intended for a 20 mm shaft; the nominal bearing bore is 25 mm and sleeve length L is 26 mm.

Technical data

• Designation: H205 ZKL
• Type: Adapter sleeve
• Shaft diameter d₀: 20 mm
• Nominal tapered bearing bore diameter d: 25 mm
• Nut outside diameter D: 38 mm
• Sleeve length L: 26 mm
• Catalogue dimension a: 8 mm
• Thread d_z: M25×1.5
• Taper: 1:12
• Material: steel
• Locknut: KM5
• Lock washer: MB5
• Example associated ZKL bearing: 1205 K

Dimensions and bearing association

Shaft diameter d₀ 20 mm and nominal tapered bearing bore d 25 mm are different dimensions. Nut outside diameter D is 38 mm; this is not the bearing outside diameter. Length L 26 mm belongs to the sleeve, not to the bearing width. The drawing also lists dimension a 8 mm. ZKL associates this sleeve, for example, with self-aligning ball bearing 1205 K having a 1:12 tapered bore. Retain the complete bearing designation and check clearance for the nut in the actual arrangement.

How the adapter sleeve works

The cylindrical sleeve bore seats on the shaft, while the external taper carries a bearing with a matching tapered bore. Tightening the nut moves the inner ring along the taper and produces the required grip on the shaft. Bearing radial clearance changes at the same time. An adapter sleeve permits mounting on plain or stepped shafts; axial location and load transfer must be assessed for the complete arrangement.

Nut, washer and supply

ZKL supplies adapter sleeves with the appropriate locknut and lock washer. For H205, the manufacturer lists nut KM5 and washer MB5. The nut is used for mounting and securing; the washer locks it after the correct setting has been achieved. Distinguish this set from a bare sleeve or another H-series length.

Mounting and clearance checks

Before mounting, check the cleanliness and condition of the shaft, taper, thread and bearing bore. Prepare contact surfaces and select the procedure according to the instructions for the fitted bearing. Drive the ring on evenly and apply mounting force without transmitting it through the rolling elements. Verify the fit using the specified method, for example radial clearance or axial displacement measurement appropriate to the bearing type. The sleeve designation alone does not establish a universal tightening torque or number of nut turns.

Dismounting and reuse

Release the locking device before loosening the nut. The bearing can move suddenly when the tapered joint releases; retain the specified stop and follow the mounting instructions. Dismounting force should pass through the appropriate ring or abutment. Before remounting, inspect threads, seating surfaces and locking parts; increased tightening is not a remedy for damaged components.

Difference from a withdrawal sleeve

An H-series adapter sleeve has its thread at the smaller end of the taper. AH, AHX and AOH withdrawal sleeves work differently and have the thread at the larger end. Matching shaft diameter alone therefore does not establish interchangeability.

Lubrication and operating data

The sleeve is a mounting component with no rolling elements or cage of its own. Determine permissible load, speed, operating clearance, sealing and lubrication for the fitted bearing and the complete arrangement. Mounting oil does not replace the bearing’s operating lubricant.