Pitch length LdLength along the neutral line of the belt, this is the number in the part number. DIN catalogues call it Lw; the value is the same. Source: part no. XPA 2000-A Z82 L=L VX, DIN 7753-1 / ISO 4184
La
2018 mm
Outside length LaLength along the back of the belt, the one a tape measure gives. For profile SPA it is 18 mm longer than the pitch length. Source: Optibelt Technical Manual V-Belt Drives
wd
11 mm
Pitch width wdBelt width at the neutral line. It equals the pitch width of the SPA pulley groove: the belt and the pulley fit each other by it. Source: Optibelt Technical Manual V-Belt Drives (allworldmachinery.com/customer/docs/OPTIBELT_TECH_MANUAL_V-BELTS.pdf), table 5 (SK), table 14; DIN 7753-1 / ISO 4184
Design
coggedX in the part number
b
12.7 mm
Top width bWidth of the belt back. Use it to check the profile of an old belt with calipers. Source: Optibelt Technical Manual V-Belt Drives (allworldmachinery.com/customer/docs/OPTIBELT_TECH_MANUAL_V-BELTS.pdf), table 5 (SK), table 14; DIN 7753-1 / ISO 4184
h
10 mm
Height hHeight of the section from the back to the bottom face of the wedge. Source: Optibelt Technical Manual V-Belt Drives (allworldmachinery.com/customer/docs/OPTIBELT_TECH_MANUAL_V-BELTS.pdf), table 5 (SK), table 14; DIN 7753-1 / ISO 4184
m
0.249 kg
Mass mMass of one piece according to the supplier. Source: supplier
Delivery, payment, questions
About the belt
b×hsection12.7 × 10mm
Ldpitch length2000mm
wdpitch width11mm
mmass0.249kg
Narrow V-belt of profile SPA, cogged with a pitch length of 2000 mm. Section 12.7 × 10 mm, pitch width 11 mm: the belt sits in the SPA pulley groove by it. Mass 0.249 kg.
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Frequently asked questions
What do Ld, Lw and La mean?+
Ld and Lw are the pitch length along the neutral line: ISO writes Ld, DIN writes Lw, the number is the same. La is the outside length along the back; for SPA it is 18 mm more. This belt has Ld 2000 mm and La 2018 mm.
Can I fit SPA 2000?+
The size and groove are the same; a plain belt has no cogs on the underside, so it bends less easily on small pulleys. You can fit it, but belts of one drive should be of one brand and one design.
How do I measure an old belt if the number has worn off?+
The top width of SPA is 12.7 mm and the height is 10 mm. A tape measure along the back gives the outside length La; subtract 18 mm to get the number in the part number.
How do I get a price and a lead time?+
Press “Request a quote” and send the part number and quantity. We reply with the price, availability and delivery terms for your country.
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