OT, NT & T Series

Series Overview

Three Top Configurations, One Proven Platform

Bombay Engineering's OT/NT/T Series Rollers offer a variety of top configurations — selection usually depends on the application. OT and NT style rollers are bolt-on styles offered with standard hole patterns in oversized top plates; the hole patterns can be altered as needed or eliminated. T style rollers have tops that are flush on all sides, ideal for weld or cavity mounting. Roller frames are fabricated from high-strength steel, and load plates of 37.5-ton and higher capacities undergo a special machine process to minimize side-to-side movement of the chain.

OT — bolt-on top plate overhangs the body sides; standard hole pattern.
NT — bolt-on top plate overhangs the body at the ends; standard hole pattern.
T — top is flush with the frame width and length; ideal for weld or cavity mounting.

OT Series

BE Part #	Capacity	Body L×H×W (in)	Top Plate T×W×L (in)	Contact Rolls	Roll Dia. × Width (in)	Weight lb (kg)
.75-OT	0.75-ton	6.5 × 3.125 × 3.625	.375 × 7.0 × 6.5	5	.8125 × 2	13 (6)
1-OT	1-ton	6.0 × 2.375 × 3.5625	.375 × 6.0 × 6.0	5	.8125 × 2	11 (5)
2.5-OT	2.5-tons	6.5 × 3.625 × 4.125	.375 × 7.0 × 6.5	4	.9375 × 2.4375	19 (9)
5-OT	5-tons	8.0 × 3.125 × 4.5625	.375 × 8.0 × 8.0	5	.9375 × 2.3125	22 (10)
8-OT	8-tons	8.0 × 3.125 × 5.3125	.375 × 8.0 × 8.0	5	.9375 × 3.3125	24 (11)
15-OT	15-tons	10.625 × 3.875 × 1.3125	.625 × 10.0 × 10.625	5	1.1875 × 2.75	47 (21)
20-OT	20-tons	10.625 × 3.875 × 6.5625	.625 × 10.0 × 10.625	5	1.1875 × 4	54 (24)
37.5-OT	37.5-tons	15.0 × 5.5 × 7.25	.75 × 12.0 × 15.0	5	1.625 × 3.5	119 (54)
50-OT	50-tons	18.5 × 5.5 × 7.25	.75 × 12.0 × 18.5	7	1.625 × 3.5	153 (69)
75-OT	75-tons	21.0 × 6.75 × 7.375	1.00 × 14.0 × 21.0	7	1.9375 × 3.625	235 (107)

Height includes top plate thickness. Dimensions in inches; mm equivalents available on request.

NT Series

BE Part #	Capacity	Body L×H×W (in)	Top Plate T×W×L (in)	Contact Rolls	Roll Dia. × Width (in)	Weight lb (kg)
.75-NT	0.75-ton	6.5 × 3.125 × 3.625	.375 × 3.5 × 8.0	5	.8125 × 2	11 (5)
1-NT	1-ton	6.0 × 2.375 × 3.5625	.375 × 3.5 × 8.0	5	.8125 × 2	10 (5)
2.5-NT	2.5-tons	6.5 × 3.625 × 4.125	.375 × 4.0 × 9.5	4	.9375 × 2.4375	19 (9)
5-NT	5-tons	8.0 × 3.125 × 4.5625	.375 × 4.5 × 11.75	5	.9375 × 2.3125	20 (9)
8-NT	8-tons	8.0 × 3.125 × 5.3125	.375 × 5.0 × 11.75	5	.9375 × 3.3125	24 (11)
15-NT	15-tons	10.625 × 3.875 × 1.3125	.625 × 5.0 × 14.75	5	1.1875 × 2.75	41 (19)
20-NT	20-tons	10.625 × 3.875 × 6.5625	.625 × 6.5 × 14.75	5	1.1875 × 4	52 (24)
37.5-NT	37.5-tons	15.0 × 5.5 × 7.25	.75 × 7.0 × 21.0	5	1.625 × 3.5	112 (51)
50-NT	50-tons	18.5 × 5.5 × 7.25	.75 × 7.0 × 22.5	7	1.625 × 3.5	140 (64)
75-NT	75-tons	21.0 × 6.75 × 7.375	1.00 × 7.5 × 27.0	7	1.9375 × 3.625	210 (95)

Height includes top plate thickness.

T Series

BE Part #	Capacity	Body L×H×W (in)	Top Plate T×W×L (in)	Contact Rolls	Roll Dia. × Width (in)	Weight lb (kg)
.75-T	0.75-ton	6.5 × 3.125 × 3.625	.375 × 3.5 × 6.5	5	.8125 × 2	11 (5)
1-T	1-ton	6.0 × 2.375 × 3.5625	.375 × 3.5 × 6.0	5	.8125 × 2	9 (4)
2.5-T	2.5-tons	6.5 × 3.625 × 4.125	.375 × 4.0 × 6.5	4	.9375 × 2.4375	17 (8)
5-T	5-tons	8.0 × 3.125 × 4.5625	.375 × 4.5 × 8.0	5	.9375 × 2.3125	19 (9)
8-T	8-tons	8.0 × 3.125 × 5.3125	.375 × 5.0 × 8.0	5	.9375 × 3.3125	22 (10)
15-T	15-tons	10.625 × 3.875 × 1.3125	.625 × 5.0 × 10.625	5	1.1875 × 2.75	38 (17)
20-T	20-tons	10.625 × 3.875 × 6.5625	.625 × 6.5 × 10.625	5	1.1875 × 4	47 (21)
37.5-T	37.5-tons	15.0 × 5.5 × 7.25	.75 × 7.0 × 15.0	5	1.625 × 3.5	103 (47)
50-T	50-tons	18.5 × 5.5 × 7.25	.75 × 7.0 × 18.5	7	1.625 × 3.5	134 (61)
75-T	75-tons	21.0 × 6.75 × 7.375	1.00 × 7.5 × 21.0	7	1.9375 × 3.625	198 (90)

Height includes top plate thickness. For 100–1000 ton capacities in this same platform, see the Heavy Duty & Heavy Moving Rollers range.

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