SAE J1759-2000 pdf download SAE Hose Measurement Study
Scope–The Measurement of Coolant Hose task group conducted a round-robin study to determine themeasuring capability of automotive suppliers and users to measure lnside Diameter (D), Outside DiameterOD), Wal Thickness (Wal and wall thickness variation of hose using traditional measuring devices anotechniques. Seven companies (five suppliers and two end users) participated in this testing. Based upon theround-robin study this information report will detail procedures, test measuring devices, results andrecommendations.
References
2.1Applicable Publications–The following publication forms a part of this specification to the extent specifiedherein.
2.1.1AIAG PUBLICATIONS-Available from Automotive lndustry Action Group, Suite 200, 26200 Lahser RoadSouthfield,MI 48034.
(MSA) Manual-Measurement Systems Analysis Manual
3Procedure-The following procedures were employed in the round-robin study:
3.1Two (2) sets of hoses were checked; there were 10 samples in each set.
3.2One end of each hose was marked for measurement. The attribute was taken from 6.4 mm (0.250 in) to25.4 mm (1.000 in) from the end of the hose.
NOTE– All measurements were made using inch measuring units due to the lack of adequate metricequipment).
3.3Three (3) people repeated each measurement three (3) times at each testing location.
3.4The data were recorded on forms supplied with the samples.
3.5Hose samples and measuring devices were brought to equilibrium for 24 h in a controlled environment of23°C + 2°C and relative humidity of 50% +5%.
4. Attributes
4.1 Procedure—All of the samples and measuring devices were forwarded to the seven participants in order. The form for recording the measurements was also included. After taking the measurements, the data were sent to the chairman of the Measurement of Coolant Hose task group for analysis. The attributes of ID, OD, Wall Thickness, and Wall thickness variation were measured as follows:
4.1 .1 I NSIDE D IAMETER —The ID of the sample hoses was measured with step gages. Two sets of gages were provided that were centered around the target of each of the hose ID’s; one set included diameter steps in increments of 0.05 mm (0.002 in) and the other 0.1 mm (0.004 in). The gages were inserted dry with a steady rotating motion and not causing more than an increase of 0.1 3 mm (0.005 in) in the OD when measured with a pi tape.
4.1 .2 O UTSIDE D IAMETER —The OD was measured by two methods:
4.1.2.1 Method 1—A plug which had an OD the same as the maximum specified ID of the hose to be measured was inserted into the hose. The OD was measured by means of pi tape. (The plug was provided for this test with diameter steps graduated in 0.25 mm (0.01 0 in) increments).
4.1.2.2 Method 2—The OD was measured by means of calipers. Find the largest OD and record; take another reading 90 degrees ± 1 5 degrees from the first and record. The average of the two readings was recorded and used as the OD of the hose. (Calipers were provided for this test)
SAE J1759-2000 pdf download
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