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7. ADJUSTMENT
BAS-311G, BAS-326G
89
7-2. Standard thread tension
Specifications Heavy-weight materials (-01) Medium-weight materials (-02)
Upper thread #20 or similar #50 or similar
Lower thread #20 or similar #50 or similar
Upper thread tension (N)
1.4 − 1.8 0.8 − 1.2
Lower thread tension (N)
0.2 − 0.3
Thread take-up spring height
(mm)
7 − 10
Thread take-up spring
tension (N)
0.6 − 1.2 0.2 − 0.5
Pre-tension (N)
0.1 − 0.6 0.1 − 0.3
Needle DP x 17 #19 DP x 5 #16
Normal sewing speed 2,000 rpm 2,000 rpm
7-2-1. Upper and lower thread tension
5155Q4661Q