Cleaves arabinose units from O-2- or O-3-monosubstituted xylose residues, thereby assisting in arabinoxylan (AX) and short-chain arabinoxylo-oligosaccharide (AXOS) degradation. Is more active on wheat bran AXOS than on wheat water-extractable AX and rye water-extractable AX. Does not display endoxylanase, xylosidase or arabinanase activity. Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides. Optimum pH is 5.6. Stable from pH 4.4 to 7.6. Optimum temperature is 45 degrees Celsius. Thermostable for 40 min from 4 to 45 degrees Celsius. Glycan degradation; xylan degradation. The CBM6 domain lost its carbohydrate binding capacity. Belongs to the glycosyl hydrolase 43 family.