Tsubaki: BS Neptune™ Chain

BS Neptune™ Chain

BS Neptune™ Chain is a Tsubaki BS chain that has undergone a special surface treatment. The link plates, bushes and bearing pins have a special two stage layer applied in order to provide the maximum protection from the operating or environmental conditions. (Spring clips are SUS301). Neptune™ rollers have a special coating designed to resist the corrosive conditions as well as the severe dynamic contact between roller and sprocket.

This chain is suitable for use in applications that are subject to alkaline cleaning and environments exposed to seawater, acid-rain and other adverse weather conditions. This chain does not contain any chemically hazardous substances such as Hexavalent Chromium, Lead, Cadmium and Mercury as regulated by RoHS√. The kilowatt ratings are the same as those of the corresponding BS chain with a working temperature range: -10°C to +150°C. Above +60°C a special high-temperature lubrication is required. Of course, BS Lambda Neptune™ chain is also available.

√ RoHS = Restriction of Hazardous Substances

Single Strand
Double Strand

Single Strand Details

Dimensions-mm
Tsubaki Chain No.	Pitch p		Roller Diameter d1	Inner Width b1
RF06B-NEP-1	9.525	3/8"	6.35	5.72
RS08B-NEP-1	12.70	1/2"	8.51	7.75
RS10B-NEP-1	15.875	5/8"	10.16	9.65
RS12B-NEP-1	19.05	3/4"	12.07	11.68
RS16B-NEP-1	25.40	1"	15.88	17.02
RS20B-NEP-1	31.75	1 1/4"	19.05	19.56
RS24B-NEP-1	38.10	1 1/2"	25.40	25.40

Dimensions in mm
Tsubaki Chain No.	Pin				Link Plate
Tsubaki Chain No.	Diameter d2	Length L1	Length L2	Length L	Thickness T	Thickness t	Height H (max.)
RF06B-NEP-1	3.28	6.35	7.65	14.20	1.30	1.00	8.20
RS08B-NEP-1	4.45	8.40	10.00	18.40	1.60	1.60	11.80
RS10B-NEP-1	5.08	9.55	11.25	21.10	1.50	1.50	14.70
RS12B-NEP-1	5.72	11.20	13.10	24.80	1.80	1.80	16.10
RS16B-NEP-1	8.28	17.75	19.95	38.90	4.00	3.20	21.00
RS20B-NEP-1	10.19	19.90	23.10	46.95	4.40	3.40	26.00
RS24B-NEP-1	14.63	26.65	31.85	62.00	6.00	5.60	33.44

Dimensions in mm
Tsubaki Chain No.	Transverse Pitch pt	Min. Tensile Strength acc. to ISO 606 kN	Min. Tensile Strength acc. to Tsubaki kN	Av. Tensile Strength acc. to Tsubaki kN	Approx. Mass kg/m
RF06B-NEP-1	-	8.9	9.0	9.9	0.39
RS08B-NEP-1	-	17.8	19.0	20.9	0.70
RS10B-NEP-1	-	22.2	23.0	25.3	0.95
RS12B-NEP-1	-	28.9	31.0	34.1	1.25
RS16B-NEP-1	-	60.0	70.0	77.0	2.70
RS20B-NEP-1	-	95.0	98.1	108.0	3.85
RS24B-NEP-1	-	160.0	167.0	184.0	7.45

RF06B-NEP chain has flat-shaped link plates.
Connecting links are clip type for sizes up to RS16B-NEP-1, and cotter type for sizes RS20B-NEP-1 to RS24B-NEP-1.
Center sink riveting is applied to RS08B-NEP-1 and to RS16B-NEP-1 single-strand chain.
Double stake riveting is applied to all other sizes single-strand chain.
When a single pitch offset link is used, please calculate a 35% reduction of the fatigue strength.
For details on corrosion resistance selection, please consult our Corrosion Resistance Guide.

Double Strand Details

Dimensions-mm
Tsubaki Chain No.	Pitch p		Roller Diameter d1	Inner Width b1
RF06B-NEP-2	9.525	3/8"	6.35	5.72
RS08B-NEP-2	12.70	1/2"	8.51	7.75
RS10B-NEP-2	15.875	5/8"	10.16	9.65
RS12B-NEP-2	19.05	3/4"	12.07	11.68
RS16B-NEP-2	25.40	1"	15.88	17.02
RS20B-NEP-2	31.75	1 1/4"	19.05	19.56

Dimensions in mm
Tsubaki Chain No.	Pin				Link Plate
Tsubaki Chain No.	Diameter d2	Length L1	Length L2	Length L	Thickness T	Thickness t	Height H (max.)
RF06B-NEP-2	3.28	11.43	12.57	-	1.30	1.00	8.20
RS08B-NEP-2	4.45	15.30	16.90	33.60	1.60	1.60	11.80
RS10B-NEP-2	5.08	17.85	19.55	39.40	1.50	1.50	14.70
RS12B-NEP-2	5.72	20.85	22.75	46.30	1.80	1.80	16.10
RS16B-NEP-2	8.28	33.55	35.75	73.80	4.00	3.20	21.00
RS20B-NEP-2	10.19	38.25	41.45	84.85	4.40	3.40	26.00

Dimensions in mm
Tsubaki Chain No.	Transverse Pitch pt	Min. Tensile Strength acc. to ISO 606 kN	Min. Tensile Strength acc. to Tsubaki kN	Av. Tensile Strength acc. to Tsubaki kN	Approx. Mass kg/m
RF06B-NEP-2	10.24	16.9	17.0	18.7	0.75
RS08B-NEP-2	13.92	31.1	32.0	35.2	1.35
RS10B-NEP-2	16.59	44.5	44.5	49.0	1.85
RS12B-NEP-2	19.46	57.8	61.0	67.1	2.50
RS16B-NEP-2	31.88	106.0	128.0	141.0	5.40
RS20B-NEP-2	36.45	170.0	197.0	217.0	7.65

RF06B-NEP chain has flat-shaped link plates.
Connecting links are clip type for sizes up to RS16B-NEP-2, and cotter type for size RS20B-NEP-2.
Intermediate plate of multi strand RF06B-NEP-2 and RS08B-NEP-2 chain is a solid plate.
Double stake riveting is applied to all sizes multi-strand chain.
When a single pitch offset link is used, please calculate a 35% reduction of the fatigue strength.
For details on corrosion resistance selection, please consult our Corrosion Resistance Guide.

Download the Neptune catalogue in PDF, here.