20B-3 Short Pitch Roller Chain

Model: 20B-3

20B-3 Short Pitch Roller Chain (model 20B-3) from the KEDI Drive Chains range, Chain Drive Series. Standard sizes ship quickly; material, heat treatment, bore and finish can be customised to drawing.

Pitch31.75 mm
StandardISO / DIN B Series
RowsTriplex
MaterialCarbon steel / stainless option

Send inquiry CAD / technical drawings

Specifications & dimensions

Pitch

31.75 mm

Technical parameters

Standard	ISO / DIN B Series
Rows	Triplex
Material	Carbon steel / stainless option

Values are nominal; final dimensions are confirmed against the approved drawing.

CAD / technical drawings

2D/3D drawings (PDF, DWG, STEP) for this model are available on request.

Request drawing

Performance features

Standardized pitch design for reliable sprocket engagement
Simplex, duplex and triplex configurations
Carbon steel, stainless steel and plated options available
Connecting links and offset links available for maintenance

Application scenarios

Industrial drives
Conveyors and packaging equipment
Machine tools
Agricultural and general machinery

Industries served

Material handling & logisticsAgricultural machineryPackaging & food processingMining & cementGeneral machinery

Product description

Short-pitch precision roller chains for industrial power transmission, available in ISO/DIN B-series and ANSI-style sizes with simplex, duplex and triplex constructions. This page is prepared for model identification, preliminary selection and quotation. The exact production configuration should be confirmed before order placement.

About this model

20B-3 Short Pitch Roller Chain (model 20B-3) is a standard item in the KEDI Drive Chains range, with Pitch 31.75 mm; Standard ISO / DIN B Series; Rows Triplex; Material Carbon steel / stainless option. It is produced to drawing and standard, inspected for dimensions and hardness before shipment, and can be supplied alone or as a matched set with mating transmission parts. Material, heat treatment, bore and surface finish can be adapted to the application.

Material & process

Material	Carbon steel or alloy steel plates, case-hardened pins, bushings and rollers
Heat treatment	Through-hardened plates; carburised pins and bushings for wear resistance
Surface	Pre-lubricated; black, shot-peened, zinc or nickel plated and stainless versions on request
Standards	ISO 606 / DIN 8187 (B series) and ANSI B29.1 (A series) dimensions
Custom options	Attachments (A/K/SA/SK), extended pins, hollow pins, special lengths and connecting links

Quality control

Pitch length measured under specified load
Tensile strength sampling per batch
Hardness of pins, bushings and plates checked after heat treatment
Visual check of riveting, rotation and lubrication before packing

How to select

Calculate design power: motor power multiplied by the service factor of the driven machine.
Choose pitch and number of strands from the power rating at the small sprocket speed.
Use at least 17 teeth on the small sprocket; keep a single-stage ratio below 7:1.
Set the centre distance at 30 to 50 pitches and plan lubrication for the running speed.
Order chain and sprockets together so pitch, roller width and tooth form match.

Ordering & packing

For a quotation, send: model 20B-3, quantity and delivery destination
For custom versions: drawing or sample, material, heat treatment and finish
Packing: anti-rust oil, moisture-proof wrap, carton or wooden case; labels on request
Lead time: confirmed with the quotation for standard sizes, and after drawing review for custom parts