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SKF TKGT 1

3.6.3 Test procedure

1.

Ensure all components are clean.

2.

Use gloves.

3. After the consistency test has been performed, insert the weight again in the housing.

Use a white background (or light colour).

Note

: the grease sample is still between the two glass plates.

4. Press on the weight, so the grease can spread further and then remove the weight.

The grease ilm becomes very thin (around 100 micrometers).

5.

Look with the naked eye for particles, non homogeneity, transparency differences,
grit, lumps and so on. This will complement the irst visual inspection. If a fresh
sample is available, compare both.

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Содержание TKGT 1

Страница 1: ...SKF GreaseTest Kit TKGT 1 Instructions for use...

Страница 2: ...cy test 15 3 4 1 Principle of operation 16 3 4 2 Material 17 3 4 3 Test procedure 17 3 4 4 Recommendations 19 3 5 Oil bleeding test 21 3 5 1 Principle of operation 21 3 5 2 Material 22 3 5 3 Test proc...

Страница 3: ...3 SKF TKGT 1 5 Maintenance 39 5 1 Cleaning 39 5 2 Spare parts 39 6 Appendixes 39 6 1 USB heater 39 6 2 USB adapter 39 6 3 Microscope 39 Original instructions...

Страница 4: ...ded in appendixes USB heater USB adaptor Microscope Read greases safety data sheets Obey local regulations regarding handling of lubricants Do not use the kit while food or drinks are standing around...

Страница 5: ...ms allowing the tests to be conducted on most sizes of bearings To further simplify procedures and safety no harmful chemicals are required for any of the testing methods Monitoring grease condition i...

Страница 6: ...6 SKF TKGT 1 2 Content Sampling tools Contamination test Consistency test CD containing instructions for use report template and consistency test scale Oil Bleeding test...

Страница 7: ...e container 5 20 Disposable gloves 6 1 Set of disposable spatulas 7 1 250 mm spatula 8 1 150 mm spatula 9 1 Pair of scissors 10 1 Housing 11 1 Weight 12 1 Mask 13 4 Glass plates 14 1 USB Heater 15 1 U...

Страница 8: ...stic 7 250 mm spatula Material stainless steel 8 150 mm spatula Material stainless steel 9 Pair of scissors Material stainless steel 10 Housing Material aluminum 11 Weight Material stainless steel 12...

Страница 9: ...3 Test Procedure 3 5 4 Recommendations 3 6 Contamination test 3 6 1 Principle of operation 3 6 2 Material 3 6 3 Test Procedure 3 6 4 Recommendations 3 7 Reporting 3 7 1 Recommendations 3 1 Collecting...

Страница 10: ...s excessive levels and so on 3 1 2 Grease in use Record if possible full information on the grease in use such as Grease name type batch and brand Find grease speciications Check NLGI grade or consist...

Страница 11: ...ysis Care should be taken when performing this step Proper tools and good practices will improve accuracy of the tests Note It is not always easy to have a representative grease sample To perform all...

Страница 12: ...so be used later for trend analysis for instance take a bigger sample 4b If the bearing is not accessible use tube cut 10 15 cm 4 6 in and syringe to suck grease through the housing by removing grease...

Страница 13: ...ng point Is the grease very different from the one in the bearing Do not use wooden spatulas oil sucked through the wood ibres can inluence results or wood ibres can contaminate the grease Do not mix...

Страница 14: ...smell often results from oxidation Various aspects in colour transparency smell can result from mixing lubricants or from lubricants incompatible with the material used for surrounding machine compon...

Страница 15: ...d on the degree of penetration achieved by allowing a standard cone to sink into the grease which has been worked for 60 strokes in a grease worker at a temperature of 25 C 80 F for a period of 5 seco...

Страница 16: ...elf life exceeded Hardening Higher NLGI value of the grease can be caused by Grease has lost base oil due to exceeded relubrication interval see oil bleeding test or because of evaporation due to cont...

Страница 17: ...temperature between 15 C and 30 C 59 F and 86 F Wristwatch or clock to measure 15 seconds not provided NLGI Grade 000 00 0 1 2 3 4 5 13 12 10 11 B 3 4 3 Test procedure 1 Ensure all components are clea...

Страница 18: ...the housing on the calibrated scale insert glass plate containing grease face up in the housing grease should not be on the paper side Align the grease spot with the centre of the scale 11 Take the we...

Страница 19: ...he colour code to determine NLGI class Fill in the provided report template section 3 4 Consistency test Note Keep the sample for test D 3 4 4 Recommendations It is good practice to test both a used a...

Страница 20: ...ue to several reasons such as non homogeneity of the sample and or contaminants blocking the spreading in some directions In this case take an average When a stain is exactly in between two grades gre...

Страница 21: ...compared to fresh Loss of base oil generally accompanied with an increase in consistency Base oil oxidation leading to base oil viscosity increase due to high temperature Big amount of hard particles...

Страница 22: ...16 15 15 14 C 12 3 5 3 Test procedure 1 Ensure all components are clean 2 Use gloves 3 Connect the supplied USB heater directly to a computer or use the USB universal adaptor provided to connect to th...

Страница 23: ...eater 6 The base oil spreads through the paper After two hours heater timer alarm can be used remove carefully the blotter paper and remove grease from it 7 The stain left is slightly elliptical This...

Страница 24: ...value in mm of the two dimensions taken in 7 for the used sample 100 785 0 2 Av D S 9 Repeat procedure with the second sample used sample if fresh one was tested irst or inversely 10 Calculate the bl...

Страница 25: ...s leads to 2 2 560 100 5 28 785 0 mm SFresh Dimensions found after testing for the used sample are 22 mm and 23 mm mm DAvUsed 5 22 This leads to 2 2 319 100 5 22 785 0 mm SUsed Bleeding difference cal...

Страница 26: ...nluence the result Perform the test at room temperature 15 C to 30 C 59 F to 86 F If temperature is below or above the heater might not reach the testing temperature The USB heater might not reach tes...

Страница 27: ...n oil from neighbouring systems or wrong grease introduced Contamination because grease reached end of life Carbonized particles are formed and stick to surfaces promoting friction Bearing wear materi...

Страница 28: ...colour Note the grease sample is still between the two glass plates 4 Press on the weight so the grease can spread further and then remove the weight The grease ilm becomes very thin around 100 micro...

Страница 29: ...mination Darkening during use 6 Switch on the light put the microscope on top of the glass plates and look through the lens Glittering of particles may indicate their metallic nature and thus hardness...

Страница 30: ...ile making it turn This allows the plate in contact with the microscope to rotate while the second plate stays static A shearing motion is created within the grease sample making particles move and ro...

Страница 31: ...contaminants In the lower magniication the observable window is about 2 mm and 1 mm for the bigger magniication This gives an idea of real size of contaminants Fresh sample intentionally contaminated...

Страница 32: ...emplate is printed on two separate pieces of paper The sections to ill in the report template are numbered similar as the instructions for use for clarity purpose Read instructions for use chapter pri...

Страница 33: ...analyses that can be performed with the kit For better understanding only main information is given in de reference cases The applied colour code helps inding the examples in the summary at the end of...

Страница 34: ...test 3 6 Fresh unused Grease A White NLGI class 2 DAvFresh 44 mm SFresh 1441 mm2 Stored Grease A Oil layer on top of grease bulk Grease is strirred in the can before to be sampled After stirring NLGI...

Страница 35: ...sh blue colour NLGI class 2 5 DAvFresh 29 mm SFresh 581 mm2 Sample 2 2 months Light darkening oily NLGI class 2 5 NLGI difference 0 DAvUsed 28 mm SUsed 537 mm2 Diff 8 Few particles Mainly carbonized p...

Страница 36: ...s Testing Sample First visual inspection 3 3 Consistency test 3 4 Oil bleeding test 3 5 Contamination test 3 6 Fresh unused A Brown NLGI class 2 DAvFresh 29 mm SFresh 581 mm2 Used A Darkening many car...

Страница 37: ...ination expected Other reasons Testing Sample First visual inspection 3 3 Consistency test 3 4 Oil bleeding test 3 5 Contamination test 3 6 Fresh unused Brown NLGI class 1 DAvFresh 40 mm SFresh 1177 m...

Страница 38: ...lection sample A Grease selection sample B Grease life Trend analysis sample 4 Contamination sample 1 Shelf life A Shelf life B Grease life Trend analysis sample 3 Grease life Trend analysis sample 2...

Страница 39: ...Quantity Size Item no See chapter 2 Content Sampling tube 2 meter 2 Sample containers 20 4 Gloves 20 pairs 5 Disposable spatulas 2 sets 6 Mask 1 12 Blotter paper 1 16 Designation Description TKGT 1 R...

Страница 40: ......

Страница 41: ......

Страница 42: ...PSU image or drawings or data sheets available on request Stontronics Ltd accepts no responsibility for typographical errors in the production of this lealet Product speciications are subject to chang...

Страница 43: ......

Страница 44: ...ublisher and may not be reproduced even extracts unless prior written permission is granted Every care has been taken to ensure the accuracy of the information contained in this publication but no lia...

Страница 45: ...al shaft Outer ring rotation Oscillating movements Vibrations Standing still Shock loads Others decribe Sealing type Mechanical seals Labyrinth seals Oil seals Shields Sealed for life Other decribe Am...

Страница 46: ...5 Contamination test 3 6 Fresh unused name NLGI class DAvFresh mm SFresh mm2 Used name NLGI class DAvUsed mm SUsed mm2 Changes NLGI difference Diff Interpretation Refer to chapter 3 7 4 in the instru...

Страница 47: ...uced even extracts unless permission is granted Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damag...

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