Linear Motion Bushing

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The close type GTB linear motion bushing has low power consumption, making it energy saving. It is also easy and convenient to lubricate, maintain and displace. Since the friction coefficient is controlled within 0.001-0.004, smooth motion and a long service life can be achieved. The GTB linear motion bushing can operate in high speed motion and it can also realize flexible, accurate and smooth motion at low speed. As the linear motion bushing can adjust its own structure to fit the size of its mating parts, the requirement on the accuracy of the mating parts is lowered. Because it is made of quality HRC58-63 alloy steel that has gone through medium frequency induction quenching, the rail shaft is highly durable, reliable, and capable of maintaining accuracy in the long term.

The linear motion bushing has the following types: GTB (general series), GTBt (special series), GTB-T with adjustable clearance (general series) and GTB-t with adjustable clearance (special series). It comes with only two rail shaft supporting bases and is commonly used for equipment that has a short travel distance or does not require high motion accuracy.

Technical Specifications of the GTB Linear Motion Bushing

Model	Sizes of the General Series
Model	d (jβ6)	d 1	d 2	D (h5)	h	C	G	G1	G2	L	L1	T	H1	H	H3	H2	H4	A
GTB13	13	5	5.8	23	20	25	45	32	20	≤500	32	38	10	40	28	9	38	32
GTB16	16	5	5.8	28	24	28	50	36	24	≤650	32	46	10	48	34	10	46	37
GTB20	20	6	7	32	27	30	60	45	30	≤800	38	50	12	53	38	12	50	42
GTB25	25	6	7	40	33	35.5	67	50	36	≤1000	38	60	12	63	42	14	58	59
GTB30	30	6	7	45	37	40	75	56	42	≤1500	38	67	12	71	50	16	66	64
GTB35	35	8	9	52	42	45	85	67	50	≤1800	48	75	16	80	56	18	74	70
GTB38	38	8	9	57	48	50	90	71	54	≤2000	48	85	16	90	63	20	82	76
GTB40	40	8	9	60	48	50	90	71	54	≤2000	48	85	16	90	63	20	82	80
GTB50	50	8	11	80	57	62.5	110	85	65	≤2500	52	105	20	110	75	25	103	100
GTB60	60	8	11	90	65	70	125	100	80	≤3000	52	120	20	125	85	25	116	110
GTB80	80	8	13.5	120	80	90	160	130	105	≤3500	60	150	25	160	110	28	150	140

Sizes of the General Series							Dynamic Load Rating ( N )	Static Load Rating ( N )	Model	Sizes of the Special Series					Dynamic Load Rating ( N )	Static Load Rating( N )
A 1(-0.2)	A 2	J	W	W 1	B	M 1 x1	Dynamic Load Rating ( N )	Static Load Rating ( N )	Model	d (jβ6)	D (h6)	A	A 1(-0.2)	A 2	Dynamic Load Rating ( N )	Static Load Rating( N )
20.9	11	18	50	48	36	M 5 x12	260	480	GTB112	12	22	32	20.4	11	250	480
23.8	13	18	56	54	42	M 5 x12	420	720	GTB116	16	26	36	22.4	12	280	550
28	16	22	60	58	45	M 6 x14	550	920	GTB120	20	32	45	28.5	16	550	970
37.4	24	22	71	68	56	M 6 x14	870	1560	GTB125	25	40	58	40.5	26	870	1560
41	26	22	80	77	63	M 8 x16	1270	2150	GTB130	30	47	68	48.5	32	1270	2150
45.5	28	28	90	87	71	M 8 x16	1670	3040	GTB35
54.5	40	28	100	96	80	M 8 x18	2050	3520	GTB38
56.4	40	28	100	96	80	M 8 x18	2050	3520	GTB140	40	62	80	56.5	40	2050	3520
69	50	30	125	121	100	M 12 x22	4010	6950	GTB150	50	75	100	72.5	53	4010	6950
80	56	30	140	135	110	M 12 x22	4800	8030	GTB160	60	90	125	95.5	71	5190	8910
99.4	75	34	180	175	150	M 12 x25	8820	14210	GTB180	80	120	165	125.5	100	8820	14120

NOTE
1. The fastener of 4-d2 hole uses the socket head cap screw.
2. The dynamic load rating and the static load rating refers to positive pressure.
3. Customers can place special orders for the rail shaft, rail shaft supporting base, and ball bearing supporting base, according to the requirements of different practical application.
4. GTB-t dimensions are the same as those of GTB type, and GTBt-t dimensions are the same as those of GTBt type. As for other dimension series, please refer to the sizes of corresponding models in the general series.

We are a linear motion bushing manufacturer based in China. We provide various types of products such as one axis CNC worktable, convex linear motion spline, ball screw, and roller guide block.