THK BL14D Link Ball | THK BL14D Distributor

More about: THK BL14D Link Ball | THK BL14D 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 BL14D

THK BL14D is a radial-direction Link Ball designed for articulated mechanical connections that require angular movement, compact installation, and reliable load transmission. It features an M14 × 1.5 male thread, a 22.225 mm ball diameter, and a 40° permissible tilt angle.

With an applied static load of 36,400 N and a yield point strength of 19,800 N, the BL14D is suitable for relatively high-load mechanical linkage applications.

Machine Tools and Mechanical Linkages

THK BL14D can be used in mechanical linkage assemblies for machine tools and industrial machinery where connected components need to accommodate angular movement.

Typical applications include mechanical linkages, adjustment mechanisms, actuator connections, lever mechanisms, and articulated assemblies. The spherical joint allows connected components to maintain mechanical movement even when their alignment changes during operation.

Automation and Actuation Systems

In automated equipment, Link Balls can connect actuators, rods, levers, brackets, and other moving components.

The BL14D provides a relatively large spherical connection for applications requiring an M14 × 1.5 threaded connection. Its angular movement capability can help accommodate alignment changes between the connected components during an operating cycle.

Mechanical Control and Transmission Mechanisms

The BL14D can be used in mechanical control and transmission systems where movement needs to be transferred between components through an articulated connection.

Possible applications include control linkages, lever mechanisms, position-adjustment systems, actuator linkages, and mechanical transmission assemblies.

The radial-direction design is suitable for applications where the primary load is supported around the spherical joint.

Automotive and Transportation Equipment

THK Link Balls can be used in automotive-related linkage mechanisms where compact articulated connections are required.

The BL14D can be considered for mechanical systems that require angular movement between rods, brackets, or other connected components and where the M14 × 1.5 thread size is suitable for the installation design.

Industrial Machinery and High-Load Linkages

With an applied static load of 36,400 N and a yield point strength of 19,800 N, THK BL14D is suitable for mechanical linkage applications requiring a relatively high-strength spherical connection.

Potential applications include industrial machinery, actuator mechanisms, mechanical control systems, equipment adjustment mechanisms, and other articulated assemblies subject to relatively high mechanical loads.

BL14D Thread and Model Selection

The BL14D belongs to the larger-size BL series and should be selected according to both load requirements and thread compatibility.

BL14D vs. BL14BD

The main difference between THK BL14D and BL14BD is the thread specification. Both models use a 22.225 mm ball diameter, have a 40° permissible tilt angle, and have the same applied static load and yield point strength.

• BL14D:   M14 × 1.5 thread
• BL14BD: M14 × 2 thread

When replacing an existing Link Ball, the thread pitch should be checked carefully. BL14D and BL14BD should not be considered directly interchangeable simply because they have the same ball diameter and load specifications.

Selection Considerations for THK BL14D

Before selecting BL14D, check the following operating conditions:

• Required radial load
• M14 × 1.5 thread compatibility
• Required angular movement
• Available installation space
• Direction and magnitude of the applied load
• Operating frequency and movement conditions
• Lubrication requirements
• Environmental conditions
• Required service life

For applications involving continuous oscillation, impact loads, or significant vibration, the actual operating conditions should be evaluated against the manufacturer’s specifications before final selection.