THK BL10D Link Ball | THK BL10D Distributor

More about: THK BL10D Link Ball | THK BL10D 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

THK BL10D is an M10 × 1.25 Link Ball with a 15.875 mm ball diameter, 40° permissible tilt angle and 18,300 N applied static load. It is designed for radial-load linkage applications requiring controlled angular movement.

THK BL10D Durability Test

THK has conducted durability testing on the BL10D Link Ball to evaluate its performance under repeated radial loading, rotation and rocking movement, as well as different operating environments.

Test Conditions
Test Item BL10D Test Condition
Radial Load   ±1,760 N
Rotation Angle  ±20°
Rocking Angle   ±20°
Durability Cycles   1,000,000 cycles
Low-Temperature Test   -30°C
High-Temperature Test   100°C
Muddy-Water Test Durability evaluation under muddy-water conditions

The durability test included combined rotation and rocking movement under radial loading for 1,000,000 cycles. Additional tests were conducted under low-temperature, high-temperature and muddy-water conditions to evaluate the suitability of the BL10D Link Ball for demanding mechanical applications.

Application of THK THK BL10D

THK BL10D is a compact Link Ball designed for mechanical linkage applications where radial load, rotation and rocking movement are required. As part of the THK BL series, BL10D combines a compact structure with wear resistance and smooth spherical movement. Its M10 × 1.25 threaded connection and 15.875 mm ball diameter make it suitable for a wide range of mechanical control and linkage applications.

1. Mechanical Linkage Systems

THK BL10D can be used in mechanical linkage systems where motion needs to be transmitted between connected components while allowing angular movement at the joint. The spherical construction helps accommodate rotational and rocking movement during operation.

2. Machine Tools and Industrial Equipment

BL10D can be used in mechanical control and linkage mechanisms associated with machine tools and industrial equipment. It is suitable for applications where moving components need a compact joint that can accommodate angular movement while maintaining a stable mechanical connection.

3. Automation and Control Mechanisms

BL10D is suitable for automation equipment and mechanical control mechanisms that use linkages to transfer movement between components. The Link Ball can accommodate relative angular movement and is useful where a compact articulated connection is required.

4. Automotive Transmission Control

THK identifies the BL series for applications such as automobile height sensors and transmission control mechanisms. THK has also conducted durability testing on the BL10D for transmission-control applications, including combined rotation and rocking movement.

The BL series has been used in transmission control joints for automobiles, trucks and buses, where reliable linkage movement is required.

5. Steering and Outdoor Mechanical Applications

THK also identifies BL-series Link Balls for steering mechanisms on agricultural tractors. The boot-equipped construction helps protect the spherical area from muddy water, making suitable BL models useful for outdoor mechanical applications and components exposed to contaminated environments.

6. Rotation and Rocking Applications

BL10D is particularly relevant to mechanisms involving combined rotation and rocking movement. THK’s published durability testing for BL10D included radial loads of ±1760 N, rotation angles of ±20° and rocking angles of ±20°, with testing conducted for one million cycles.

THK has also published BL10D durability tests under low-temperature, high-temperature and muddy-water conditions, demonstrating the type of operating environments considered for this Link Ball series.

7. Selection Considerations for BL10D

When selecting THK BL10D, the applied load direction, load magnitude, required rotation or rocking angle, mounting dimensions and operating environment should be considered.

Model BL is designed for radial load application. THK specifies that the applied load direction should be checked carefully because using the product in a different load direction may cause damage.

For applications requiring axial load, the THK RBI series should be considered instead of the BL series.