THK BL5DA Link Ball | THK BL5DA Distributor

More about: THK BL5DA Link Ball | THK BL5DA Distributor

Note: Model BL-A is only available in size 4 and 5.
For more detailed specifications, please download the Product Catalog with the link in the Downloads section of this product page.

Model No.	Outer dimensions			Threaded S1 JIS Class 2	Holder dimensions						Ball shank dimensions						Ball diameter Da	Permissible tilt angles 2θ°	Applied static load Cs	Yield point strength Pk	Mass
	Length L	Diameter D	Height M		L1	l	L2	D1	D2	W 0 -0.3	d2 h9	M1	M2 ±0.3	l1	Hexagon B 0 -0.3	d4
																						mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	degree	N	N	g
	BL4DA	24.5	13		20	M4×0.7	18	8	4	7.5	9.5	8	4	15	7	6	7	8.1	7.938	40	4510	1370	7
BL5DA	34.5	15	26.7	M5×0.8	27	15	4	9	12	10	5	21	10	8	8	9.2	9.525	40	6470	2250	12
BL6D	38	16	32.6	M6×1	30	16	5	10	13	11	6	26	11	11	10	11.6	11.112	40	9900	3920	26
BL8D	45.5	19	38.6	M8×1.25	36	19	6	12.5	16	14	8	31	14	12	12	13.8	12.7	40	12500	6570	49
BL10D	55.5	25	46.3	M10×1.25	43	23	7	14.5	19	17	10	37	17	15	14	16.2	15.875	40	18300	11300	87
BL10BD	55.5	25	52.3	M10×1.5	43	23	7	14.5	19	17	10	43	17	21	14	16.2	15.875	40	18300	11300	90
BL12D	64.5	29	52.7	M12×1.25	50	26	8	17.5	22	19	12	42	19	17	17	19.6	19.05	40	26700	16400	143
BL12BD	64.5	29	59.7	M12×1.75	50	26	8	17.5	22	19	12	49	19	24	17	19.6	19.05	40	26700	16400	148
BL14D	74	34	68.4	M14×1.5	57	30	10	20	25	22	14	56	21.5	22	19	21.9	22.225	40	36400	19800	235
BL14BD	74	34	74.4	M14×2	57	30	10	20	25	22	14	62	21.5	28	19	21.9	22.225	40	36400	19800	245
BL16D	83	38	74	M16×1.5	64	34	11	22	27	24	16	60	23.5	23	22	25.4	22.225	30	36400	26900	315
BL16BD	83	38	80	M16×2	64	34	11	22	27	24	16	66	23.5	29	22	25.4	22.225	30	36400	26900	325

Application of THK THK BL5DA

THK BL5DA is a compact Link Ball designed for mechanical linkage applications where controlled angular movement is required between connected components. As part of the THK BL / BL-A Link Ball series, BL5DA can provide smooth link motion while accommodating angular movement in the joint. Its compact design makes it suitable for machinery and equipment where space is limited and reliable mechanical connection is required.

1. Machine Tools and Mechanical Linkages

THK BL5DA can be used in mechanical linkage mechanisms within machine tools and other industrial equipment. In these applications, the Link Ball connects moving components and allows the required angular movement between them while transmitting mechanical motion.

2. Automation Equipment

BL5DA is suitable for compact linkage mechanisms used in automation equipment. It can be used where two connected components need to move relative to each other while maintaining a stable mechanical connection. Its compact construction is useful for equipment with limited installation space.

3. Control and Actuation Mechanisms

Link Balls can be used in control mechanisms where movement from one component needs to be transferred to another through a linkage. THK BL5DA provides a compact joint for these mechanisms and can accommodate the angular movement generated during operation.

4. Automotive and Transportation Mechanisms

THK identifies BL-series Link Balls as suitable for linkage applications such as automobile height sensors and transmission control mechanisms. The BL series has also been used in transmission control joints for automobiles, trucks and buses, as well as steering mechanisms for agricultural tractors.

5. Compact Articulated Mechanisms

BL5DA is also suitable for compact articulated mechanisms that require a small mechanical joint with angular movement. The Link Ball structure allows connected components to move through the required angle while maintaining the connection between the components.

6. Selection Considerations for BL5DA

When selecting THK BL5DA, the application should be checked according to the actual load direction, applied load, required angular movement, installation dimensions and operating environment. THK specifies the BL series for radial load application, so the load direction should be considered carefully during mechanical design.

For applications requiring a different load direction or a different connection configuration, other THK Link Ball models such as the RBI series or other BL-series models may be more appropriate.