20B-1

Roller chainISO 20Bsingle-strand

single-strand ISO 606 B-series roller chain — pitch 1.25" (31.75 mm). ISO 606 B-series — interchangeable across all major brands at matching designation.

Tsubaki20B-1

Pricing not yet available.

We're building pricing coverage for chain. In the meantime, this cross-reference shows the equivalent designations and per-brand part numbers so you can source the right chain from any supplier — the ANSI / ISO standard guarantees the dimensional match.

Specifications

Designation20B
SeriesISO 606 B-series roller chain
Strand count1 (single-strand)
Pitch1.25" (31.75 mm)
Roller diameter0.75"
Width between plates0.77"
Pin diameter0.401"
Plate thickness0.173"
Plate height1.024"
Min tensile (ANSI)22,054 lb
Max allowable load4,136 lb
Mass2.59 lb/ft
Pin typeriveted
Source:VerifiedVerified — U.S. Tsubaki Roller Chain Catalog · last checked last month · perfect interchange

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PDF includes specs, dimensions, and cross-references for 20B-1.

Equivalents Across Brands

ANSI B29.1 / ISO 606 standardize all primary dimensions across manufacturers — chains at matching designation are dimensionally interchangeable. Always verify brand-rated working load against your application before substitution.

BrandPart NumberGrade nameOEM
TsubakiRS20BRBRSYes

Related Chains

Other strand counts in the same designation, plus cross-series equivalents at matching pitch.

1-strand
20B-1
1.25" pitch4,136 lb allow
2-strand
20B-2
1.25" pitch7,037 lb allow
3-strand
20B-3
1.25" pitch10,341 lb allow
Same pitch (100)
100-1
1.25" pitch5,070 lb allow

Strand-Count Comparison

All strand counts side-by-side
Compare 20B-1 through 20B-3 →