THK BL16D Link Ball | THK BL16D Distributor

More about: THK BL16D Link Ball | THK BL16D 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 BL16D Permissible Tilt Angle

The THK BL16D has a 30° permissible tilt angle, allowing the Link Ball to accommodate angular movement between connected mechanical components.

The permissible tilt angle should be considered when designing or selecting a Link Ball. The connected components should operate within the specified angular range to avoid excessive movement that may affect the holder or protective boot.

Application of THK THK BL16D

THK BL16D is a radial-direction Link Ball designed for articulated mechanical connections requiring high mechanical strength and controlled angular movement. It features an M16 × 1.5 male thread, a 22.225 mm ball diameter, and a 30° permissible tilt angle.

With an applied static load of 36,400 N and a yield point strength of 26,900 N, the BL16D is suitable for relatively high-load mechanical linkage applications where a larger threaded connection is required.

Machine Tools and Mechanical Linkages

THK BL16D can be used in mechanical linkage assemblies for machine tools and industrial machinery where connected components need to transmit mechanical movement while accommodating angular displacement.

Typical applications include linkage mechanisms, adjustment assemblies, actuator connections, lever mechanisms, and articulated mechanical components.

The spherical joint allows connected components to accommodate changes in alignment during operation without requiring a completely rigid connection.

Automation and Actuation Systems

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

The BL16D is suitable for applications requiring an M16 × 1.5 threaded connection and a relatively high load capacity. Its spherical joint can accommodate angular movement between connected components during an operating cycle.

Mechanical Control and Transmission Mechanisms

The BL16D can be used in mechanical control and transmission systems where movement needs to be transferred between components through an articulated connection.

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

Because BL16D is a radial-direction Link Ball, the actual load direction should be considered carefully during product selection.

Industrial Machinery and High-Load Linkages

With an applied static load of 36,400 N and a yield point strength of 26,900 N, THK BL16D is suitable for mechanical linkage applications requiring a relatively strong spherical connection.

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

Automotive and Transportation Equipment

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

The BL16D can be considered for applications where the M16 × 1.5 thread size, load requirements, and available angular movement are suitable for the mechanical design.

BL16D and BL16BD Thread Difference

THK BL16D and BL16BD use the same 22.225 mm ball diameter and have the same applied static load and yield point strength. The main difference is the thread specification.

Model Thread Ball Diameter Permissible Tilt Angle Applied Static Load Yield Point Strength Mass
THK  BL16D    M16 × 1.5 22.225 mm 30°   36,400 N    26,900 N   315 g
THK  BL16BD M16 × 2 22.225 mm 30°    36,400 N     26,900 N   325 g

When replacing an existing Link Ball, the thread pitch must be checked carefully. Although BL16D and BL16BD have the same ball diameter and load specifications, their thread pitches are different and they should not be considered directly interchangeable without checking the mating component.

Selection Considerations for THK BL16D

Before selecting BL16D, check the following operating conditions:

Required radial load
M16 × 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

The permissible tilt angle of BL16D is 30°, so the required angular movement should be checked carefully during mechanical design.

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.