SKF TKGT 1 Instructions For Use Manual
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SKF TKGT 1 Instructions For Use Manual

SKF TKGT 1 Instructions For Use Manual

Grease test kit
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SKF Grease Test Kit
TKGT 1
Instructions for use

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Summary of Contents for SKF TKGT 1

  • Page 1 SKF Grease Test Kit TKGT 1 Instructions for use...

  • Page 2: Table Of Contents

    3.6.4 Recommendations ...................31 3.7 Reporting ........................32 3.7.1 Recommendations.....................32 Reference cases ....................33 4.1 Grease shelf life / Quality ...................34 4.2 Grease life / trend analysis ..................35 4.3 Grease selection ......................36 4.4 Contamination ......................37 4.5 Summary ........................38 Original instructions SKF TKGT 1...
  • Page 3 Maintenance ....................39 5.1 Cleaning ........................39 5.2 Spare parts ........................39 Appendixes .....................39 6.1 USB heater ........................39 6.2 USB adapter .........................39 6.3 Microscope ........................39 Original instructions SKF TKGT 1...

  • Page 4: Safety Recommendations

    Do not use the kit while food or drinks are standing around. • Comply with machinery and local safety recommendations before sampling. • Use provided nitrile, powder free disposable gloves to avoid direct skin exposure with grease. Long term contact with greases may cause skin allergic reactions. SKF TKGT 1...

  • Page 5: Introduction

    The SKF Grease Test Kit TKGT 1 has been especially designed to be used in the ield and offers a complete fast testing method. No special training is required and the tests themselves are easy to perform.

  • Page 6: Content

    2. Content Sampling tools Contamination test Consistency test CD containing instructions for use, report template and consistency test scale Oil Bleeding test SKF TKGT 1...
  • Page 7 Sample container Disposable gloves Set of disposable spatulas 250 mm spatula 150 mm spatula Pair of scissors Housing Weight Mask Glass plates USB Heater USB/220V/110V adaptor Blotter paper pack Ruler Microscope AAA LR03 lithium batteries Carrying case SKF TKGT 1...

  • Page 8: Technical Data

    Ruler Material: aluminum, graduated 0.5 mm Microscope Refer to Appendix 6.3 AAA LR03 lithium batteries Carrying case Dimensions: 530 × 110 × 360 mm (20.9 × 4.3 × 14.2 in.) Weight complete kit: 3,2 kg (7.05 lb) SKF TKGT 1...

  • Page 9: Analysis Protocol

    A softening of grease can be caused by excessive vibrations, oil contamination, housing overilled, and so on. Knowing vibration levels, inding an oil can nearby the application or revising the amount of lubricant put at each relubrication interval can simplify analysis. SKF TKGT 1...

  • Page 10: Application Conditions

    The suitability and relubrication intervals can be checked online - SKF LubeSelect http://www.skf.com/portal/skf/home/aptitudexchange - SKF LuBase http://www.skf.com/portal/skf/home/aptitudexchange A subscription may be required to access these services. Note all your collected information on the provided report template on section 3.1: Application & lubrication conditions. SKF TKGT 1...

  • Page 11: Collecting Grease Samples

    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 the tests, just 0.5 gram (0.02 oz) of grease is needed. 3.2.1 Material SKF TKGT 1...

  • Page 12: Sampling Procedure

    The grease should not reach the syringe. These samples are less representative than the ones taken directly from the bearing, but can still help to spot some issues. Tube in sample container Fill in the provided report template section 3.2: Collecting samples. SKF TKGT 1...

  • Page 13: Recommendations

    • For trend analysis, take the sample always at the same sampling position. • Take application photos if possible. Example of bad sampling methods Bad marking Broken sample container Transparent container Inappropriate Inappropriate container Too much grease SKF TKGT 1...

  • Page 14: First Visual Inspection

    Note: A blackening of the grease does not necessarily mean that the grease is not good. Fill in the provided report template section 3.3: First visual inspection 3.3.1 Examples Darkening Various aspects in colour - Dryness - extreme case grease contamination SKF TKGT 1...

  • Page 15: Consistency Test

    445-475 Very luid 400-430 Fluid 355-385 Semi-luid 310-340 Very soft 265-295 Soft 220-250 Medium hard 175-205 Hard 130-160 Very hard 85-115 Extremely hard Note: Greases for bearing applications have generally a NLGI value between 1 and 3. SKF TKGT 1...

  • Page 16: Principle Of Operation

    A ixed grease volume is spread between two glass plates for 15 seconds by means of the weight. By comparing the grease stain obtained with the calibrated measuring scale, the consistency of the grease can be evaluated. Weight 15 seconds Glass plates Grease sample Diameter SKF TKGT 1...

  • Page 17: Material

    6. Take the grease sample to analyze from the sample container using a disposable spatula 7. Apply the grease in the mask. Make sure that hole is full with grease and wipe off excess on the top. SKF TKGT 1...
  • Page 18 (grease should not be on the paper side!) – Align the grease spot with the centre of the scale. 11. Take the weight and the second glass plate together with the glass plate beneath the weight, lower gently on the housing. The weight should not touch the grease! SKF TKGT 1...

  • Page 19: Recommendations

    It is good practice to test both a used and fresh/unused sample of the same grease. By comparing the two stains obtained, differences in stiffness within the same NLGI grade can be observed. fresh used fresh used SKF TKGT 1...
  • Page 20 When a stain is exactly in between two grades, grease could be classiied as a NLGI 1-2 for example. NLGI 1-2 Reminder: The test is meant to be performed at 15-30 °C (60-85 °F). If temperature is different, the NLGI grade will be given at this temperature. SKF TKGT 1...

  • Page 21: Oil Bleeding Test

    By measuring the diameter of the stain formed, calculating the bled area and comparing with the area given by an unused fresh sample, the change in bleeding properties can be evaluated. Bled area Heat 2 hours SKF TKGT 1...

  • Page 22: Material

    55 °C – 65 °C (130 °F - 150 °F). Using the mask, apply grease sample on the blotter paper. The hole should be completely illed with grease. Wipe the excess away and remove carefully the mask. SKF TKGT 1...
  • Page 23 The stain left is slightly elliptical. This is due to the paper ibres orientation. To be more precise, take both minor and major diameters using the ruler (millimeters) and make an average value of them. SKF TKGT 1...
  • Page 24 − = 100 × Used Fresh Diff Fresh • If result is negative, then bleeding is reduced. • If result is positive, then bleeding is increased. Fill in the provided report template section 3.5: Oil bleeding test. SKF TKGT 1...
  • Page 25 Dimensions found after testing for the used sample are: 22 mm and 23 mm, AvUsed This leads to × − Used Bleeding difference calculation leads to: − × − Diff Negative result means that used grease is bleeding 43% less than fresh unused grease. SKF TKGT 1...

  • Page 26: Recommendations

    Severe contamination can, in certain cases block oil bleeding and result will show a consequent difference, while the grease still seems to be oily. This might happen if the sample taken is a mix of used grease and grease added during a relubrication interval. SKF TKGT 1...

  • Page 27: Contamination Test

    After the consistency test has been performed, the grease spread between the two glass plates can be inspected by using a microscope. 3.6.2 Material Preparation before test: • insert batteries in the microscope. • use sample already compressed between the two plates from test B. SKF TKGT 1...

  • Page 28: Test Procedure

    The grease ilm becomes very thin (around 100 micrometers). 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. SKF TKGT 1...
  • Page 29 Darkening during use 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. Metallic contamination Oxidation particles Thickener agglomerate SKF TKGT 1...
  • Page 30 A shearing motion is created within the grease sample making particles move and rotate. Shows glittering! Black particle (due to f.e. oxidation, seals etc) When turning shows glittering! Fill in the provided report template section 3.6: Contamination test. SKF TKGT 1...

  • Page 31: Recommendations

    This gives an idea of real size of contaminants. Fresh sample intentionally 50 microns contaminated with known sized contaminants 1 mm Look for glittering. Making the particles rotate can scratch the glass plates. Consider to change the glass plates from time to time. SKF TKGT 1...

  • Page 32: Reporting

    The report template has two pages: - The irst page is related to application conditions & lubricant used and the SKF LubeSelect section. Once this part has been illed with information, it should not change unless machine operating condition change consequently.

  • Page 33: Reference Cases

    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 this chapter. Grease shelf life Grease life / trend analysis Grease selection Grease contamination SKF TKGT 1...

  • Page 34: Grease Shelf Life / Quality

    S Used : can before to be NLGI difference: 1177 sampled. % Diff : Interpretation Grease A: - Mechanical properties unchanged after stirring According to specifications Grease B: - Mechanical properties changed (softening) Out of specifications SKF TKGT 1...

  • Page 35: Grease Life / Trend Analysis

    S Used : particles. (6 months) little oily (sticky, dry) % Diff : Interpretation Sample 2: - Sample in good condition Sample 3: - Sample in good condition Sample 4: - Advanced grease degradation Reconsider relubrication interval SKF TKGT 1...

  • Page 36: Grease Selection

    Used NLGI class: D AvUsed : Yes but restricted and Darkening, oily NLGI difference: S Used : very fine. +0.5 Dispersed 1177 % Diff : Interpretation Advanced grease degradation. Sample A: Sample in good condition. Sample B: SKF TKGT 1...

  • Page 37: Contamination

    Darkening, oily NLGI difference: S Used : park 2 1476 % Diff : Interpretation Sample 1: - Sample in good condition. Sample 2: - Severe grease softening. Check for possible sources of oil contamination. Check sealing and leakage. SKF TKGT 1...

  • Page 38: Summary

    4.5 Summary SKF TKGT 1...

  • Page 39: Maintenance

    Mask Blotter paper pack Designation Description TDTC 1/C General toolcase without inlay, size C 6. Appendixes On this CD ROM the following instructions for use are as PDF available: 6.1 USB heater 6.2 USB adapter 6.3 Microscope SKF TKGT 1...
  • Page 42 part of Stadium Group Plc. 5V USB Plug & Go Range • Universal / Full Range Input • Features: Features: • Level 6 Eficiency • Universal / Full Range Input • Universal / Full Range Input • Cost Effective & Highly Reliable •...
  • Page 44 | mapro.skf.com | skf.com/lubrication ® SKF is a registered trademark of the SKF Group. © SKF Group 2018 The contents of this publication are the copyright of the publisher 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 liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.
  • Page 45 Date: ../../..SKF Grease Test Kit TKGT 1 - Report Template Application & lubrication conditions (Refer to chapter 3.1 in the instructions for use) Application type: Machine number (bearing position):   With W33 design Bearing type and designation: ...
  • Page 46 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 damage whether direct, indirect or consequential arising out of use of the information contained herein. SKF Maintenance Products MP5366E-1 · 2009/11 · © SKF 2009 ® SKF is a registered trademark of the SKF Group www.mapro.skf.com www.skf.com/lubrication...
  • Page 47 MP5366-2 · 2009/11 · © SKF 2009 in this publication but no liability can be accepted for any loss or damage whether direct, indirect or ® SKF is a registered trademark of the SKF Group consequential arising out of the use of the information contained herein.

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