1、BSI Standards PublicationBS 6635:2015Manufacture of saddle treesmade from wood SpecificationPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2015Published by BSI Standards Limited 201
2、5ISBN 978 0 580 80545 5ICS 97.220.40The following BSI references relate to the work on this document:Committee reference SW/136/14Draft for comment 15/30270868 DCPublication historyFirst published September 1985Second edition, April 2003Third (present edition), June 2015Amendments issued since publi
3、cationDate Text affectedBS 6635:2015 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 14 Materials 25 Angle dimensions 56 Symmetry 57 Manufacture 78 Marking 10Bibliography 11List of figuresFigure 1 Mild steel mushroom head rivets proportions 3Figure 2 Angle
4、 dimension for saddle trees 5Figure3Treedatum points 6Figure 4 Example of a symmetry measuring jig 7Figure 5 Mild steel rounded 90 countersunk head rivets proportions 8List of tablesTable 1 Mild steel solid mushroom head rivets 4Table 2 Angle dimensions for saddle trees 5Table 3 Measurements for the
5、 symmetry of saddle trees 6Table 4 Mild steel rounded 90 countersunk head rivets 9Summary of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 12, an inside back cover and a back cover.BRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 iFor
6、ewordPublishing informationThis British Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 30 June 2015. It wasprepared by Subcommittee SW/136/14, Saddle trees, under the authority ofTechnical Committee SW/136, Sports, playgro
7、und and other recreationalequipment. A list of organizations represented on this committee can beobtained on request to its secretary.SupersessionThis British Standard supersedes BS 6635:2003, which is withdrawn.Information about this documentThis is a full revision of the standard, and introduces t
8、he following principalchanges to the specified: quality of component metals; quantity, type and dimensions of rivets; manufacturing process; and load test failure value.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsrequirements are expressed
9、 in sentences in which the principal auxiliary verb is“shall”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Requirements in this standard are drafted in accordance with Rules for thestructure and drafting of U
10、K standards, subclause J.1.1, which states,“Requirements should be expressed using wording such as: When tested asdescribed in Annex A, the product shall .”. This means that only those productsthat are capable of passing the specified test will be deemed to conform to thisstandard.Contractual and le
11、gal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 6635:2015ii The British Standards Institution
12、 20151 ScopeThis British Standard specifies constructional and dimensional requirements forthe manufacture of saddle trees made from wood. It applies to horse-ridingsaddles for general use (jumping, showing, hacking, dressage and similaractivities) but excludes saddle trees for use with racing saddl
13、es.This standard does not give requirements for saddle trees made from syntheticmaterials, which are given in BS 7875.2 Normative referencesThe following referenced documents are indispensable for the application ofthis document. For dated references, only the edition cited applies. For undatedrefer
14、ences, the latest edition of the referenced document (including anyamendments) applies.PD 970:2005, Wrought steels for mechanical and allied engineering purposes Requirements for carbon, carbon manganese and alloy hot worked or coldfinished steelsBS 1203:2001, Hot-setting phenolic and aminoplastic w
15、ood adhesives Classification and test methodBS 1449-1.1:1991, Steel plate, sheet and strip Part 1: Carbon andcarbon-manganese plate, sheet and strip General specificationBS 3146-1, Specification for investment castings in metal Part 1: Carbon andlow alloy steels.BS 3146-2, Specification for investme
16、nt castings in metal Part 2: Corrosion andheat resisting steels, nickel and cobalt base alloysBS EN 1982, Copper and copper alloys Ingots and castingsBS EN 10029, Hot-rolled steel plates 3 mm thick or above Tolerances ondimensions and shape SpecificationBS EN 10048, Hot rolled narrow steel strip Tol
17、erances on dimensions and shapeBS EN 10051, Specification for continuously hot-rolled strip and plate/sheet cutfrom wide strip of non-alloy and alloy steels Tolerances on dimensions andshapeBS EN 10088-2, Stainless steels Part 2: Technical delivery conditions forsheet/plate and strip of corrosion re
18、sisting steels for general purposesBS EN 10095, Heat resisting steels and nickel alloysBS EN 10111:2008, Continuously hot-rolled low carbon steel sheet and strip forcold forming Technical delivery conditionsBS EN ISO 9445-1, Continously cold-rolled stainless steel Tolerances ondimensions and form Na
19、rrow strip and cut lengthsBS EN ISO 9445-2, Continously cold-rolled stainless steel Tolerances ondimensions and form Wide strip and plate/sheet3 Terms and definitionsFor the purposes of this British Standard, the following term and definitionapplies.3.1 saddle treeframework on which a riding saddle
20、is madeBRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 14 Materials4.1 Wood4.1.1 Beech or birch veneer as specified in 4.1.2 or birch plywood as specifiedin 4.1.3 shall be used for the manufacture of saddle trees.4.1.2 Beech or birch veneer of 2 mm maximum thickness shall be use
21、d andlaminated using an adhesive conforming to type WBP as specified in 4.2.4.1.3 Birch plywood shall be used using adhesive conforming to type WBP asspecified in 4.2.4.2 AdhesivesAdhesives shall conform to BS 1203:2001, type WBP.4.3 Metal4.3.1 Cap and gullet plates4.3.1.1 Cap and gullet plates shal
22、l be made from one of the types of steelspecified in 4.3.1.2, 4.3.1.3 or 4.3.1.4.4.3.1.2 Pressed steel shall conform to BS EN 10111:2008, grade DD11.4.3.1.3 Forged steel shall conform to PD 970:2005, grade 070M20.4.3.1.4 Stainless steel shall conform to type 304 HR or BS EN 10088-2.4.3.2 Stirrup bar
23、s or the component parts of the bars4.3.2.1 Stirrup bars, or the component parts of the bars, shall be made from oneof the metals specified in 4.3.2.2, 4.3.2.3, 4.3.2.4 or 4.3.2.5.4.3.2.2 Forged steel shall conform to PD 970:2005, grade 070M20.4.3.2.3 Stainless steel shall conform to either type 304
24、 HR or BS 3146-1,BS 3146-2, BS EN 10029, BS EN 10048, BS EN 10051, BS EN 10088-2, BS EN 10095,BS EN ISO 9445-1, BS EN ISO 9445-2. Thumb bit springs shall conform totype 304 S31 temper rolled.4.3.2.4 Aluminium bronze shall conform to BS EN 1982.4.3.2.5 Stirrup bars and rivets shall be deemed to compl
25、y with this standard ifthey pass a vertical load test of 4.5 Kn or above.4.3.3 Spring steelSpring steel shall be rolled to conform to either type CS 70 or CS 80 380/420 inaccordance with BS 1449-1.1:1991.4.3.4 RivetsStirrup bars shall be attached to trees using no less than 3 rivets ofdiameter 6.22
26、mm or above or 4 rivets of diameter 4.66 mm or above. Mild steelrivets conforming to the dimensions given in Figure 1 and Table 1 shall be used.NOTE Rivets that exceed the minimum but are in proportion to the dimensionsgiven in Table 1 may be used.BRITISH STANDARDBS 6635:20152 The British Standards
27、Institution 2015Figure 1 Mild steel mushroom head rivets proportionsKeyA Diameter of headB Depth of headL Length of shankD Diameter of shankBRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 3Table1MildsteelsolidmushroomheadrivetsShankdiameterHeaddiameterHeaddepthDA=2.25DB=0.5DNomi
28、nalToleranceinmminmminmminmm3/160.1884.760.184/0.1904.66/4.810.42210.720.0942.387/320.2195.560.214/0.2225.43/5.630.49212.500.1092.781/40.2506.350.245/0.2536.22/6.430.56314.290.1253.185/160.3137.940.307/0.3177.79/8.040.70317.860.1563.97NOTE1Shankdiametertolerances,headdiameteranddeptharederivedfromBS
29、641:1951,Table3.A)NOTE2Notoleranceshavebeenspecifiedforheaddiameteranddepthforshanklength.NOTE3Itisnormaltohavearadiusundertheheadandattheperipheryoftheheadbutnodimensionsspecified.A)Withdrawnstandard.BRITISH STANDARDBS 6635:20154 The British Standards Institution 20155 Angle dimensionsThe angle dim
30、ensions formed at the head of the saddle tree (see Figure 2) shallbe as specified in Table 2.NOTE 1 The manufacture of trees may have variations in the design and shape ofthe saddle tree head while maintaining the angle.NOTE 2 Angle dimensions do not equate to width markings. Because of thevariation
31、 in the shape of horses, the recognised importance of saddle fitting and theprevalence of bespoke saddles, this standard does not require trees to have a widthmarking.Figure 2 Angle dimension for saddle treesTable 2 Angle dimensions for saddle treesFitting Angle ANarrow (N) 75 to 84.9Medium (M) 85 t
32、o 94.9Wide (W) 95 to 104.9Extra wide (XW) 105 and above6 Symmetry6.1 To ensure symmetry, measurements between datum points (as shown inFigure 3) shall be as specified in Table 3. These measurements shall be takenbefore the saddle maker carries out any further work.BRITISH STANDARD BS 6635:2015 The B
33、ritish Standards Institution 2015 5Figure 3 Tree datum pointsTable 3 Measurements for the symmetry of saddle treesComponent symmetry Points of reference (L = left, R = right)Head Y to AL=YtoARBar position X to BL=XtoBRWaist Y to CL=YtoCRSeat Y to DL=YtoDRCantle Y to EL=YtoERBar pitch Z to GL=ZtoGRBa
34、r height Z to HL=ZtoHRWaist height Z to JL=ZtoJR(asatC)Seat rail height Z to KL=ZtoKR(asatD)All measurements shall be equal within2mm.6.2 Tolerances shall be measured using any device offering sufficient accuracy(see Table 3).NOTE See Figure 4 for an example jig.BRITISH STANDARDBS 6635:20156 The Bri
35、tish Standards Institution 2015Figure 4 Example of a symmetry measuring jig7 Manufacture7.1 The head of the saddle tree shall consist of laminations with a totalminimum thickness of 8 mm and the side bars with a minimum thicknessof 7 mm.7.2 Gullets of pressed or stainless steel shall be lipped and n
36、ot less than 2.95 mmin thickness and not less than 32 mm in width at the apex of the plate.7.3 The long axis of the gullet plate shall be parallel to the direction of rolling.7.4 Forged steel gullet plates shall be made from forging steel conforming toPD 970:2005, 070M20, with a cross-section of not
37、 less than 200 mm2at the apexof the arch.NOTE If forged, the gullets do not have to be lipped.7.5 The number of rivets in the gullet plates between the joints of the side barsshall be not less than eight on a straight-head tree and ten on a cutback-headtree.7.6 Rivets shall go through both cap plate
38、 and gullet plate and shall beadequately burred over. The riveting process shall not affect the integrity of theplate. Countersunk rivets of no less than 4.66 mm diameter shall be used. Therivets shall be of mild steel rounded 90 countersunk conforming to thedimensions given in Figure 5 and Table 4.
39、NOTE 1 Rivets that exceed the minimum but are in proportion to the dimensionsgiven in Table 4 may be used.BRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 7NOTE 2 Any excess metal, after the rivets are burred over, should be removed toprevent injury.7.7 Stirrup bars shall be atta
40、ched to trees using no less than 3 rivets ofdiameter 6.22 mm or above or 4 rivets of diameter 4.66 mm or above.7.8 Cap and cantle plates shall be fitted.7.9 Joints at the head and cantle shall be made with an adhesive as specifiedin 4.2.7.10 All internal corners of gullet plates shall have minimum i
41、nternal radiiof 3.16 mm.7.11 Any finishing process shall not diminish the strength of the metal.7.12 To assist with moisture retention in the lamination saddle trees shall besealed or finished.NOTE This can be achieved by use of scrimming or an appropriate sealant.Figure 5 Mild steel rounded 90 coun
42、tersunk head rivets proportionsKeyA Diameter of head D Diameter of shankB Depth of head L Length of ShankC Depth of roundBRITISH STANDARDBS 6635:20158 The British Standards Institution 2015Table4Mildsteelrounded90countersunkheadrivetsShankdiameterHeaddiameterHeaddepthDepthofroundDA=2.25DB=0.5DC=0.20
43、1DNominalToleranceinmminmminmminmminmm3/160.1884.760.184/0.1904.66/4.810.3097.860.0611.550.0380.967/320.5635.560.214/0.2225.43/5.630.3619.170.0711.810.0441.121/40.6256.350.245/0.2536.22/6.430.41310.480.0812.060.0501.28NOTE1ShankdiametertoleranceisderivedfromwithdrawnBS641:1951,Table3.A)NOTE2Notolera
44、nceshavebeenspecifiedforheaddiameter,depth,radiusandangleofcountersinkorshanklength.NOTE3Itisnormaltohavearadiusundertheheadandattheperipheryofthecountersinkbutnodimensionsspecified.A)Withdrawnstandard.BRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 98 MarkingEach saddle tree sh
45、all be marked with the following information:a) the number and date of this British Standard, e.g. BS 6635:2015, stamped onthe near side stirrup bar; andb) the manufacturers name, trademark or other means of identification.BRITISH STANDARDBS 6635:201510 The British Standards Institution 2015Bibliogr
46、aphyStandards publicationsFor dated references, only the edition cited applies. For undated references, thelatest edition of the referenced document (including any amendments) applies.BS 641:1951 (withdrawn), Dimensions of small rivets for general purposesBS 7875, Synthetic saddle trees Specificatio
47、nBRITISH STANDARD BS 6635:2015 The British Standards Institution 2015 11BRITISH STANDARDBS 6635:201512 The British Standards Institution 2015 This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-rel
48、ated publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization products are published by BSI Standards Limited.British Standards Institution (BSI)BSI Group Headquarters389 Chiswick High Road London W4 4AL UKAbout usWe bring together busi
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