1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13 & 4 1988 02 09 Released SM/ER 1915 TC B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
2、C Page 1 of 5 DRIVE BELT, TOOTHED - HYDROGENATED NITRILE WSD-M96D15-A2 RUBBER (HSN) - GLASS TENSION CORDS - EXTENDED LIFE - DOUBLE FACING FABRIC NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a toothed drive belt based on Hydrogenated Nitrile rubber (HSN) with a
3、 double layer of polyamide facing fabric and glass fiber tension cords. The belt is suitable for use where average service temperatures up to 125 C and peak service temperatures up to 140 C are experienced. The belt is oil and water resistant and remains flexible down to -40 C. 2. APPLICATION The sp
4、ecification was released originally for materials used as toothed belts used to drive components such as camshaft, injector pump and/or auxiliary engine parts. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standa
5、rd Requirements For Production Materials (WSS-M99P1111-A). 3.4 BELT CONSTRUCTION The belt shall consist of a Hydrogenated Nitrile rubber (HSN) compound molded to the required tooth profile, covered on the contact face by a double layer of woven polyamide 6 or 66 fabric. There shall be no more than o
6、ne join in the fabric except on belts with lengths greater than 925 cms. when two joins are permissible. The belt shall be reinforced by multifilament glassfiber tensioning cords in S and Z twist pairs. The pairs of cords shall be evenly spaced across the width of the belt. The cords shall be covere
7、d by a layer of rubber the same as that used for the teeth. There shall be no ends or loops of tensioning cords protruding from the cut sides of the belt. 3.5 MATERIAL TESTING - RUBBER The following tests shall be performed on finished belts and/or test specimens cut from them. The test specimens sh
8、all be die-cut from the finished parts and buffed or slit to the required thickness where necessary. When not feasible, specimens cut from molded test slabs manufactured from the same material with an equivalent state of cure shall be used. The test specimens shall have the following dimensions: 150
9、 x 150 mm, min x 2.0 +/- 0.2 mm 3.6 ORIGINAL PROPERTIES 3.6.1 Hardness, International 65 - 72 (ASTM D 1415) ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.6.2 Hardness, Durometer A 65 - 72 (ASTM D 2240, insta
10、ntaneous, plied-up specimens) 3.6.3 Tensile Strength, min 18 MPa (ASTM D 412, Die C) 3.6.4 Elongation at Break, min 375% (ASTM D 412, Die C) 3.6.5 Modulus at 100% Elongation 2.5 4.0 MPa (ASTM D 412, Die C) 3.6.6 Compression Set, max 60% (ASTM D 395, Method B, 70 h at 125 C) 3.6.7 Brittleness Point,
11、max -40 C (ASTM D 2137, Method A) 3.7 HEAT AGED (ASTM D 573, 1000 h at 125 +/- 2 C) Hardness Change, max +20 Tensile Strength Change, max -20% Elongation at Break Change, max -80% 3.8 HEAT AGED (ASTM D 573, 168 h at 140 +/- 2 C) Hardness Change, max +15 Tensile Strength Change, max -30% Elongation a
12、t Break Change, max -60% Modulus at 100% Elongation 6.0 to 8.0 MPa 3.9 IMMERSION IN ASTM OIL No.1 (ASTM D 471, 168 h at 140 +/- 2 C) Hardness Change -5 to +8 Tensile Strength Change, max -30% Elongation at Break Change, max -30% Modulus at 100% Elongation 2.5 to 4.5 MPa Volume Change, max -10 to +10
13、% ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.10 TENSION CORDS Glassfiber, multifilament spun with S twist and Z twist alternated. 3.11 FACING FABRIC Two layers of woven polyamide 6 or 66 fabric bonded tog
14、ether, the outer fabric being of heavier construction. The facing fabric construction shall be such that the requirements of this Material Specification and any Engineering Component Specification relating to the toothed belt are met. 3.12 FINISHED PART 3.12.1 Hardness, International (ASTM D 1415 Mi
15、cro Method) Tooth 65 - 72 Back 65 - 72 3.12.2 Breaking Load Test Method: Tests to be conducted on complete belts by pulling at 25 mm/min between two 114 mm cylinders mounted with teeth facing outwards. One of the cylinders shall turn freely to equalize stress in the belt. The belt shall be 20 +/- 0.
16、5 mm wide unless otherwise stated on the Engineering Drawing. Original, min 22 kN Heat Aged, min 20 kN (Test Method per 3.7) Heat Aged, min 20 kN (Test Method per 3.8) After Immersion in ASTM Oil No.1, min 20 kN (Test Method per 3.9) After Immersion in 5% Sodium Chloride 16 kN Solution, min (168 h a
17、t 60 +/- 2 C) 3.12.3 Face Fabric Adhesion to Rubber Test Method: The face fabric(s) shall be separated from the rubber at 50 mm/min on a tensile testing machine giving a continuous autographic load record. From the load record for each tooth stripped of its fabric, calculate the maximum peak force a
18、nd the minimum valley force. Determine the mean peak and valley forces for at least 6 consecutive teeth. In some cases it may be found that the fabric breaks instead of peeling from the rubber. This shall be noted in the results and be deemed acceptable providing the value at which breakage occurs e
19、xceeds the specified Valley requirement. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 Original, min Peak: 100 N/cm Valley: 20 N/cm Heat Aged, min Peak: 60 N/cm (Test Method per 3.7) Valley: 15 N/cm Heat Aged,
20、 min Peak: 45 N/cm (Test Method per 3.8) Valley: 12 N/cm After Immersion in ASTM Oil No.1, min Peak: 80 N/cm (Test Method per 3.9) Valley: 15 N/cm 3.12.4 Fabric Adhesion, Outer Layer from Inner Layer Test Method: The outer face fabric layer shall be separated from the inner layer by the method descr
21、ibed in para. 3.12.3. Original, min Peak: 55 N/cm Valley: 15 N/cm Heat Aged, min Peak: 18 N/cm (Test Method per 3.7) Valley: 10 N/cm Heat Aged, min Peak: 30 N/cm (Test Method per 3.8) Valley: 10 N/cm After Immersion in ASTM Oil No.1, min Peak: 50 N/cm (Test Method per 3.9) Valley: 12 N/cm 3.12.5 Hea
22、t Aged No Cracks (Test Method per 3.7) Test Method: After ageing the belt shall be bent around a 25 mm diameter mandrel, the teeth facing inwards and outwards respectively (separate samples required). 3.12.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, belt to be bent around a 50 mm dia. mandrel
23、with the teeth facing inwards) 3.12.7 Low Temperature Flexibility (168 h at -40 +/- 2 C) Test Method: After conditioning, the belt shall be bent within 1 second around a temperature conditioned 25 mm diameter mandrel. Separate samples of belt shall be tested with the teeth facing inwards and outward
24、s respectively. The belts shall be examined at 2X magnification. Original No Cracks Heat Aged per 3.7 No Cracks Heat Aged per 3.8 No Cracks ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5 3.12.8 Oil Resistance N
25、o splitting, (Test Method per 3.9) cracking or delamination Test Method: After conditioning, separate samples of belt shall be bent around a 25 mm diameter mandrel with the teeth facing inwards and outwards respectively. 3.12.9 Tooth Shear Resistance (FLTM BP 111-01, RHD and RPP+ Profiles.) Original, min 0.9 kN/cm width Heat Aged, min 0.9 kN/cm width (Test Method per 3.7) Heat Aged, min 0.9 kN/cm width (Test Method per 3.8) After Immersion in ASTM Oil No.1, min 0.8 kN/cm width (Test Method per 3.9, belt to be wiped dry with a cloth before fixing to jig).
