Shim rings are measured by their thickness, inner diameter, and outer diameter. To calculate the ideal shim thickness, measure the largest air gap with an inside micrometer and divide this gap by five. Shim height is also measured, however, the added length of a tab (if present) is not factored. ! 13 0 obj Figure 4: End view of step shimmed machine foot. 
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Y8 You can reject cookies by changing your browser settings. Tightening the anchor bolts under these conditions would force the feet flat to the base, thereby distorting the machine and increasing the radial load on the bearings. For additional information please refer to our below documents: We do not recommend using a Waterjet to cut Practishim, as it may discolor the material. Arbor shims (slitter shims) are thin, washer like discs designed to prevent axial movement in assembled components. 0000061210 00000 n
<>/A<>/Type/Annot/Rect[448.685 780.743 484.57 771.429]>> Rolls of metal shim vary in width from 6mm up to 1 metre, and shim lengths from 1 metre (or above if coiled). Thus, make sure a 1" micrometer is a standard part of your alignment toolkit. Arbor shims are measured by their thickness, outer diameter, and inner diameter. accurate alignment is determining how thick the shims are. A stainless steel shim stock is perfect for making spring clips, retainers, and washers. Keep up on our always evolving product features and services. <>/A<>/Type/Annot/Rect[34.072 786.53 97.6068 765.97]>> As part of this best practice, it is imperative that you always maintain your shim cases fully stocked with all thicknesses, otherwise shim consumption may balloon. 
application/pdfShim StockShim Stock | Spaenaur.com
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They are used in automotive body panels, electric motor mounts, and many other applications. 0000002224 00000 n
When ordering, arbor shims are identified by their inner diameter and thickness. Get yours today: Power Transmission components for everything from the tool room to the production line including key stock, machine keys, tool steel, shims, spacers, and more. 
Note too that the motor was painted in situ, covering the shims and jackscrews in paint and also allowing paint to go under the foot. jWD You should try to never use more than three (or four at most) precut shims under one machine foot, except in exceptional circumstances. Huyett PO Box 232 1215 E. 8th Minneapolis, KS 67467. Sometimes, a machine will have feet that are significantly angled with respect to the contact surface of the base plate or sole plate supporting them. When ordering, slotted shims are identified by their width, length, and thickness. For instance, if you must fill a 20 thousandths tapered air gap, dividing this gap by five yields an ideal step shim thickness of 4 mils. - 0.10mm material to 4 tolerance).
x}rG&vi4R$ZT7EQ 46"QBTU 1o1=ugm)?,DA0 Variable shims are measured by their thickness, as well as inner and outer diameter. 
As long as your topmost shim supports the surface area defined by the cross-sectional cut of this cone under the foot, you are adequately supporting the load zone of the machine's foot and do not need to support any excess surface area under the foot. West Midlands
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Most machine feet are made much larger in surface area than what is strictly necessary to support the mass of the machine and its operational load stresses. All of this will cost you the most valuable commodity of all: time. <>/A<>/Type/Annot/Rect[502.55 780.743 530.371 771.429]>> Click in the box below to select thickness: Explosion-Proof Electric Rotary Actuators. It is important to select your brand of precut stainless steel shims carefully, as they vary widely in quality and tolerances. In machining applications, shims are precision engineered to specific tolerances for use in precise machinery positioning. This means you need
Material Certificates and Certificates of Conformity are available. For instance 0.075" shims may mike out at 0.078" and 0.100" shims may actually measure 0.104" thick. This means as you tighten the anchor bolts and apply load to the shims, they will tend to remain in place rather than "squirt out" like watermelon seeds. This effect is usually due to a slight lack of coplanarity between the machine's feet and base, and in some cases, slight bowing of the shims. Slotted shims are measured by their thickness and width as well as the slot depth and width. We are able to supply a wide range of shim sizes having thicknesses from 0.003mm to 5.00mm, all produced to the stringent T3 international standard for thickness (e.g. The most comprehensive guide to grease fittings (Zerks) and threads the world has ever known. The reason for this is too many shims under a machine foot leads to increased risk of exceeding your permissible soft foot tolerance. Moreover, the Size A' shim used on top of the shim stack is too small for a motor of this size. G.L. Py|u
IWDzukbw:o(J;PIZljub)y':FW3+I,})@enfG]4d7 M@5 *^I5[h"E`]f>FDlmS>A&UrE]#4r-;O5 shims for thickness accuracy, you could easily double your alignment time. J4WAG3+OKYhJXA$)->wd/$@@q8 JC!$9B\EQy:
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vP"{MYrMXjPR.J0"NGT*V#Y&MFEf@6PbAN T'|3Dx'dh ]T\HWb j\$X iDk=XfqrIZHEHy^YiL What Is Industrial Maintenance as a Service? startxref
Fax | (724) 746-0711 Measure the clearance needed for take up using a feeler gauge. 0 In the end, cheaper shims always end up costing you much more than good quality shims, given the increased labor costs resulting from the necessity of making repeated adjustments of the machine's position and the greater downtime that results from the shims' inaccuracies. Use four, 4 thousandths shims to fill the tapered air gap as evenly as possible. Keep in mind, too, that the "bent" foot may be symptomatic of a larger problem with the machine, such as internal damage if it resulted from the machine being dropped in transport or installation. Blog post currently doesn't have any comments. Repco Technology Ltd. Besides his work, Alan enjoys spending time with his family and numismatics. GPL Ghostscript 8.71; modified using iTextSharp 4.1.6 by 1T3XTshim stock, steel shim stock" As shims are added, more compression takes place, increasing the risk of slippage or undesired vibration of a mechanical component. Practi-Shim materials can be purchased in sheets and/or rolls depending on thickness.
21 0 obj Industrial maintenance as a service (#imaas) transfers the digital and/or manual management of maintenance and industrial operations from machine users to machine manufacturers (OEMs), while improving it considerably. Conducting an asset criticality assessment (ACA) is the first step in maintaining the assets properly. The best way, of course, would be to re-machine the base plate, sole plate, or undersides of the machine feet in such a way as to eliminate the lack of coplanarity. endobj If you have questions about a certain product or application, contact our experienced and friendly Sales team today! Let's examine a few of these. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This field is for validation purposes and should be left unchanged. Shim rings, also called tolerance rings, are used in stamped, molded, or worn housing to form a tight hold on bearings. 19 0 obj Some standard shim sizes can also be determined based on standard motor frame numbers. Always measure the thickness of any shim 0.050" or thicker with a micrometer. How do you solve this problem? We can also supply special widths and lengths - please contact us direct with your requirements. endobj Tel: 631-231-1515 FAX: 631-231-1625 threadcheck.com, Toll Free: 1-800-767-7633 FAX: 1-800-767-7633 Email: info@threadcheck.com, Our ISO Certificate DUNS #063262642 CAGE/NCAGE #6NGK6 Customer Satisfaction Survey. A joint venture between two of the worlds largest steel companies inspired innovative approaches to maintenance reliability that incorporate the tools, technology and techniques of today. It goes without saying that if the time and resources are readily available, you should consider re-machining the undersides of the feet or the contact surfaces of the base plate, or making a tapered "dutchman" shim for the foot. Stainless steel shim stock comes with a thickness between from .0005 to .031. Metal shims are precisionmade shims from a variety of metals including carbon steel, alloy steel, spring steel, stainless steel, and brass. Not to be overlooked is the lost time consequences of minor cuts caused by poor quality shims that can be very significant not just in terms of the time required to treat the injuries, but also from all the consequent paperwork required to comply with your internal safety incident reporting requirements. 80% of Reliabilityweb.com newsletter subscribers report finding something used to improve their jobs on a regular basis. To step shim correctly, choose a shim thickness that will allow you to stack no more than four shims to fill the uneven air gap between the underside of the foot and its support surface.
3 0 obj When it comes to criticality analysis, there are three key factors must be emphasized. endobj providing our customers with the highest quality shims in the industry. %PDF-1.4 % Variable shims are divided into two categories: shortening and lengthening. Precut stainless steel shims come in several standard industry sizes, as pioneered by Lawton Industries many years ago: These are: Size A: 2" 2" with a 5/8" slotSize B: 3" 3" with a 13/16" slotSize C: 4" 4" with a 1 1/4" slotSize D: 6" 5" with a 1 5/8" slotSize G: 7" 7" with a 1 3/4" slotSize H: 8" 8" with a 2 1/4" slot, Lawton has published a chart of horsepower ranges and motor frame numbers associated with the different sizes of shims. FREE 1Hour Virtual Uptime Elements Introduction. 133 0 obj <>stream This article highlights the hidden trap of performance management systems. 0000060905 00000 n <>/A<>/Type/Annot/Rect[235.557 20.875 263.322 13.564]>> These are: 0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.100" and 0.120". AccuTrex Products, Inc. is pleased to offer Practi-Shim color coded plastic shim stock in thicknesses from .0005 to .060. You can calculate approximately from a quarter to half a thousandths of an inch (0.00025-0.0005") movement from compression for each air space under the foot. <>/A<>/Type/Annot/Rect[195.987 33.315 223.752 26.004]>> It is a myth that you have to support the entire surface area of the machine foot with the shim. 0000001519 00000 n {24Ab[iO>2tRLYa& Fun6/s2:sn_L6o0?P)I)-r] Onv'=x%]]]Kl.0.^kFvAc$-i'/WISfEw[~s}Wb9"@hr~ -kf:?9uo". Enter your e-mail to subscribe to our newsletter. With these 13 thicknesses, you can achieve any desired shim thickness, from 1 to 150 thousandths, with never more than three shims. Subscribers get exclusive content. endobj %PDF-1.4 In conclusion, best practices in shimming for machinery alignment and soft foot correction involve some care and attention to detail, the use of high quality, burr free, precut stainless steel shims and good shimming technique. This can accelerate shim wear and cause premature failure.
Step shimming requires several thinner shims to be carefully inserted between the machine's foot and its support surface in such a way that they are offset from one another in step fashion. 0000060310 00000 n Good quality, precut stainless steel shims come in 13 thicknesses, ranging from 1 mil to 120 mils. Siskin Drive For motor frame applications, shim size can be estimated based on the horsepower of the machine. how far away from the nominal thickness many shim suppliers can be that purchase gauge Some lesser quality shims usually have raised knife edges (burrs) along their edges because they are not tumbled after being stamped out of the sheet and the dies used to stamp them out are not sharpened often enough. Over 2,000 high-quality lifting, rigging, and suspension hardware components in inch and metric sizes for use in a broad range of applications and industries. Visit our product FAQs page to learn more about the shims we offer. 1XRx`KM&9JJCZXx44FF! u4BZ&U V3VL *aV11A% bhH#mtBPIE*I> u7CHh$1ch\lDjJIc( v$D7C!>r& p5h5(Ms5:!*>2@I]KE> endobj
Copyright 2022 G.L. 16 0 obj Most of our competitor's shims The chart below shows just These spaces are compressed upon torqueing of bolts or during the operation of a mechanical component. Choose your shim supplier with care and keep your shim boxes fully stocked with all available thicknesses, in all the sizes needed to adequately support the load zones of the machines in your plant. The load zone (depicted in red) is defined as a cone approximately 45 degrees from the edge of the flat washer under the anchor bolt through the thickness of the machine foot. Cutting your own shims by hand out of cheaper rolls of carbon steel or brass shim stock may save you money in materials, but will prove far more expensive overall for several reasons. Good machine installation practices dictate that a good rough alignment between the machines should not necessitate ever having more than 100 mils worth of shims under any machine foot to achieve final alignment within tolerance.
They are used to lengthen or shorten the effective length of shoulder bolts (aka shoulder screws or stripper bolts). Three Things You Need to Know About Criticality Analysis, Conducting Asset Criticality Assessment for Better Maintenance Strategy and Techniques. Shim stock is measured by its thickness, length, and width. This fills the tapered gap between the underside of the foot and its support plane as evenly as possible, as illustrated in Figure 4. Slotted shims come in a variety of shapes and can serve multiple purposes. endobj % endstream Always insert your shims until you feel them touch and then withdraw them slightly. Avoid using cheaper brands that only ink their shims, or worse yet, punch stamp them with the thickness marking. 'hX]. endobj Coventry a micrometer to determine the actual thickness. 18 0 obj Let's see why: Precut: You don't have to hand cut them, saving you much time.Burr free: This means greater precision in the thickness.Accurate in their thickness (up to 0.025").Even thickness throughout.Flat and undistorted.Convenient: Steel carrying cases make transporting shims easy and help to keep them neat and organized.Versatile: More thicknesses and sizes to choose from means you will use fewer shims to achieve the desired thickness, thereby saving both time and money in materials.Safe: The safety tab allows for safe manipulation of each shim. Step shimming works well since the angles involved are sufficiently small enough to fall well within what is known as the swedge' angle for the coefficient of friction of the materials involved. The Distributor's #1 Choice for Fasteners! Use the following charts to serve as a guide. This leaves us with the only other possible solution: step shimming. endobj While we are on the topic of angled feet or irregular surfaces, let us address the topic of "soft" shims for a moment. This article addresses the best maintenance strategy for assets by using ACA techniques. We can ship Overseas but only by your shipping agent on your account. For one thing, you will be able to cut only the thinner thicknesses with scissors or shears, whereas thicker thicknesses (over 0.004") will require using an acetylene torch or a saw, which is labor intensive and presents several safety concerns. w?'uo@to;[rsD?NMMg1.dON>y~"&Ejwgo@"+ i{%Mwvq0yrxfxKE^LL%gz=Np>2ES;3ZNveGQ4 See Figure 2 for an illustration of the load zone and the area that should be supported by the shims. You may think that limiting your shimming to just three shims under a machine foot is unrealistic and unreasonable, however, it is not. Punch stamped shims is a sign that they are not flat, resulting in a leaf spring effect under the machine's feet that contributes to a "squishy foot" soft foot. fH Never shim more than an overall elevation of .150" in one application. Sheets of shimare also available in widths from 25mm to 1 metre. Never allow your fingers to get under a machine foot! Practi-Shim Color Coded Plastic Shim Stock. <>stream 1 0 obj You only need to support the load zone around the anchor bolt. Discover our comprehensive inventory of axially and radially installed retaining rings and installation tools in inch and metric sizes. ), the movement can be greater. 0000063820 00000 n <>/A<>/Type/Annot/Rect[287.687 780.743 340.342 771.429]>>
?!/@+01-;=ssXZReyQBB8C$n When the anchor bolt of this foot is tightened, the foot will be stressed, distorting the machine's frame and altering the internal alignment of the bearing bores, as well as affecting the air gap between rotor and stator. 15 0 obj In other words, you are creating a shim fitted to the distorted condition of the machine, rather than to its undistorted, stress-free configuration. Huyett Marketing Department on 05/13/2021 with 0 comments. When a shim is used a small space is created above and below it. This also results in a shim of inaccurate thickness, which will contribute to or even cause a squishy soft foot; it also constitutes a significant safety hazard for the millwright who is not using safety gloves. %$I&% H.0K@(`q@1)U tAXTAbp-LJ`pYC() l y(WzH9FN|/cdX`!a5\-\YY So, if a machine foot is larger than a given size of a shim, but the shim adequately supports the load zone around the hole in the foot, you do not have to worry if the outer edges of the foot overhang the shim a bit- that is perfectly okay. Shim stock is thin precision stock material from which custom shims can be cut. trailer (Contrast this with some brass alloys that can yield as much as six percent!). If you do not check these inferior quality In addition, if you are cutting shims by hand, there is a far higher risk of minor cuts, requiring a visit to the nurse for a bandage, with the attendant's loss of time and safety-reporting paperwork this would entail. REGISTER NOW! If the angularity between the foot and the base is too large, consider replacing the entire machine or the base, as may be. AISI tolerance material.
For the best experience on our site, be sure to turn on Javascript in your browser. Practi-Shim materials are color-coded to provide users with an accurate, reliable recognition of thickness for ease of use. <>/A<>/Type/Annot/Rect[134.797 20.875 204.444 13.564]>> 12 0 obj In fact, if you have to shim 26 thousandths, choose to use a 20 and two 3s, rather than a 25 and a 1 alone. For instance, if you run out of fifteens, you will find yourself using a ten and a five, or three fives, which quickly escalates your shim costs and increases the risk of violating the rule of using no more than three shims under a foot. 0000002720 00000 n Arbor shims are machined to specific tolerances for an exact fit and used in machinery alignment applications on milling cutters, saws, and grinding tools. are produced from gauge material with a very wide tolerance range. ____________________________________________________, Alan Luedeking is Vice President of Ludeca, Inc. in Doral, FL. <]>> Soft shims that mold themselves to the uneven opening under the feet are not recommended; they allow the machine's casing to distort when the feet are tightened before they set and harden, thereby resulting in an undesirable, strained condition of the machine's frame. 2 0 obj endobj He has 30+ years experience in machinery shaft alignment and training and holds an ISO level I Vibration Analyst Certificate. I3g,akPeXpa. An excellent shim will always save you time and money in the long run. Note: Standard delivery is now 10 working days. However, this may not be practical or economical to do. By continuing to use our website you agree with our use of cookies in accordance with our, By clicking "I Agree", you agree to our Terms and that you have read our, 3-Wire Thread Measuring Holder Library Sets, Pin Gage Sets - Class ZZ Pin Gage Sets - Sets and Libraries, Class Z Pin Gage Sets - Class X Pin Gage Sets - Sets and Libraries, Standard Class X Plug Gage Assemblies - Steel - Inches, Standard Class X Plug Gage Members - Steel - Inches, Reversible Plain Plug Gages - Class XX - ZZ, Taperlock Plain Plug Gages - Class XX - ZZ, Micrometer Set Masters - Model 16-1 up to 6.0"/150mm, Micrometer Set Masters - Model 16-1/2 up to 6.0"/150mm, Micrometer Set Masters - Model 112 up to 12"/300mm, Micrometer Set Masters - Model 01-1 up to 1.0"/25.0mm, Feeler Gauge Carbon Steel - Metric - Style MFB, Feeler Gauge Coils High Carbon Steel - Style FC, Feeler Gauge Coils Stainless Steel - Style FC, Feeler Gauge High Carbon Steel Blades - Style FB, Feeler Gauge Stainless Steel Blades Style FB, Feeler Gauges Carbon Steel - Metric - Style MFC, Feeler Heavy Thickness Gauges - Carbon Steel Style FB, Hardness Testers and Hardness Testing Equipment.