XT Series Four Point Contact Ball Bearing

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1. Description
The XT series four point contact ball bearing has rectangular cross section and it belongs to customization products. It is available with the outer diameter not exceeding 218 inches, i.e., 5500mm. This style of slewing bearing enjoys wide applications in occasions where standard products are unable to meet customer requirements on size, weight or performance.

2. Features
a. Owing to the deep groove raceway and balls of the maximum size, this series of four point contact ball bearing is capable of withstanding higher torque, thrust, and radial load than common products.

b. The rolling element bearing is equipped with perfect seal which helps discharge contaminants.

c. This series or deep groove ball bearing is available in three types, no tooth type, internal tooth type, and external tooth type.

3. Supply Capacity
The shortest delivery time can be provided for this series of ball bearing. Custom bearing or other specialized products are also available.

4. Application
This range of ball bearing is often utilized as slewing ring bearing for following machines:
a. Crane
b. Lift/elevator
c. Excavator
d. Wind turbine
e. Universal derrick
f. Shredder
g. Timber loader
h. Logging saws

XT External Gear XT Internal Gear XT No Gear

5. Technical Parameters

No Gear
P/N	OUTLINE DIMENSIONS AND WEIGHT								HOLE DATA						GEAR DATA α = 20°						GEAR TOOTH RATING Fz	BEARING MOMENT RATING Crm
	OUTLINE DIMENSIONS AND WEIGHT								OUTER RING			INNER RING			GEAR DATA α = 20°
	Do	di	H	Ho	Hi	Dr *	dr *	G APPROX.	Lo	no	Bo	Li	ni	Bi	TOOTH FORM	D2	Pd or (m)	z2	x2	b2
	(in)	(in)	(in)	(in)	(in)	(in)	(in)	(lbs)	(in)		(in)	(in)		(in)	TOOTH FORM	(in)				(in)	(lbs)	(ft-lbs)
12740001	24.650	16.250	2.375	2.063	2.063	—	—	145	22.250	16	0.813	17.750	20	0.813	—	—	—	—	—	—	—	159,000
12750001	26.900	18.500	2.375	2.063	2.063	—	—	155	24.500	18	0.813	20.000	24	0.813	—	—	—	—	—	—	—	188,000
12770001	29.650	21.250	2.375	2.063	2.063	—	—	180	27.250	24	0.813	22.750	28	0.813	—	—	—	—	—	—	—	232,000
12775001	33.534	23.125	2.875	2.563	2.563	—	—	305	30.625	18	0.938	24.875	24	0.938	—	—	—	—	—	—	—	338,000
12780001	38.201	27.750	2.875	2.563	2.563	—	—	350	35.250	24	0.938	29.500	28	0.938	—	—	—	—	—	—	—	443,000
12785001	41.850	28.750	3.250	2.880	2.880	—	—	530	38.000	20	1.063	31.000	24	1.063	—	—	—	—	—	—	—	587,000
12790001	47.444	34.250	4.250	3.875	3.875	—	—	835	43.875	24	1.188	36.250	28	1.188	—	—	—	—	—	—	—	873,000
16289001	61.250	52.325	3.540	2.800	2.800	—	—	585	59.625	30	0.844	54.000	30	0.844	—	—	—	—	—	—	—	348,000
16389001	87.992	69.094	6.024	5.512	5.512	—	—	3,330	83.543	52	1.535	73.543	52	1.535	—	—	—	—	—	—	—	3,675,000
16290001	129.000	113.000	5.500	5.000	5.000	—	—	3,950	125.500	72	1.063	116.500	72	1.063	—	—	—	—	—	—	—	1,337,000
16291001	178.000	162.000	5.500	5.000	5.000	—	—	5,350	174.500	96	1.063	165.500	96	1.063	—	—	—	—	—	—	—	2,258,000

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