NSK Bearing Heaters

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NSK Hydraulic NutsBase numberSize (bore)(Examples)200 = 200 mm (metric thread)199 = 199 mm (7.8740 inch thread)180 = 180 mm (metric thread)179 = 179 mm (7.0866 inch thread)Seriesblank = metric threadZ = inch threadB = blank (no thread)Style-1 = standard-2, -3, -4 etc. = variationon standardHMV 199 Z -1Hydraulic nuts from NSK utilize an axial drive-up methodto ensure the accurate and quick installation of taperedbore bearings. The axial drive-up method ensures that theinternal clearance and interference fit is correct bymonitoring the movement of the piston, and thus thebearing's inner ring, in relation to the hydraulic nut. Thismethod minimizes the need to continually check theclearance reduction with feeler gages.The benefit of NSK’s patented axial drive-up method isthat it does not require the use of a dial indicator or charts.Competitive axial drive-up systems require a special dialindicator and the use of printed charts, which not only addto cost but can also be difficult to read.NSK hydraulic nuts are coated with Armoloy, a specialpermanent anti-rusting layer, making them much moredurable than other offerings. They also use NPT portsso replacement fittings are inexpensive and easy to obtain.Cranking handles come in standard diameter rod sizes soreplacements can be made from standard stock insteadof having to buy specialized sizes as is common withcompetitive offerings. Larger sizes are made withtapped holes for eye bolts for easy lifting.Hydraulic nuts come complete with jackout bolts that are very useful in making thereplacement of seals quick and easy. A fullsize range is available and all hydraulicnut kits come in a securecarrying case.RollJournalSeatTapered Bore SRBNutNPTF Oil PortAxial Drive-up PinPistonPatented Design11
NSK Hydraulic NutsThere are three different ways to use Hydraulic Nuts. Below are the three methods. Contact NSK if you have any questions.Before MountingAfter Mounting1Axial displacement method1Axial displacement methodCrCmCbXDsDaCb = Cm + CrDs = Da + XDaCmOverhang “X”Axial DisplacementPin and back ofHydraulic Nut areflushDa = Min. Axial DisplacementCb = Bench ClearanceCm = Mounted ClearanceCr = Clearance ReductionDs = Starting DistanceDa = Min. Axial DisplacementX = Overhang after InstalledUsing Axial Displacement Pin:Piston is ready to move the bearing by pushing against the inner ring.Using Axial Displacement Pin:Piston has moved the bearing the minimum axial displacement.The Axial Displacement pin is flush with the back of the nut.2Straight edge method2Straight edge methodGapAxial Displacement PinWrenchWrenchBack of NutNo GapAxial Displacement PinUsing Straight Edge:Placing a straight edge such as a wrench will show a gap.Using Straight Edge:The gap has disappeared indicating the bearing has movedthe minimal axial displacement.3 Dial indicator method 3 Dial indicator methodMagnetic BaseMagnetic BaseDial IndicatorUsing Dial Indicator:Place a dial indicator on the back of the axial displacement pin.Dial IndicatorUsing Dial Indicator:Watch the gage to determine the axial displacement of the bearing.12
Page 1 and 2: Bearing Maintenance ToolsFor the in
Page 3 and 4: Pullers, Pushers,Straighteners& Tri
Page 5 and 6: BlockGageStrapCORPBEARING1:12 Taper
Page 7 and 8: BModel No.CHE0110A CHE0110B CHE0210
Page 9 and 10: Tri-SectionPress PlatesCK3-_∅A∅
Page 11: Puller/StraightenerCK-10inCK-10inCK
Page 15 and 16: Jack Out BoltNPTF PlugWrench1HMV74Z
Page 17 and 18: Jack Out BoltNPTF PlugWrench1HMV74Z
Page 19 and 20: Spanner WrenchBase numberSizeNumber

NSK Bearing Heaters

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