ContiTech SPA1257LW Ummantelte Keilriemen

ContiTech SPA1257LW — a wrapped V-belt, section SPA (AV13) to DIN 7753-1 / ISO 4184, for friction power transmission between two pulleys. All three length datums at a glance: inside length Li 1,212 mm, datum length Ld 1,257 mm, outside length La 1,275 mm. When cross-referencing other brands, always compare the same length datum. The cross-section measures 12.7 × 10 mm at a 40° wedge angle.

Any V-belt of section SPA (AV13) with datum length 1,257 mm is a drop-in replacement, regardless of brand. Key design data: minimum recommended pulley datum diameter 90 mm; weight 0.123 kg per metre. The fabric wrap protects the tension cord against abrasion, oil and ozone — the robust standard for industrial drives (belt speeds up to about 30 m/s). Permissible ambient temperature range: -40 to 100 °C.