Rolled ball screw, no preload type (nut only) BLK

Drawing

[ ! ] This product is the nut only. For the shaft only, see >>here: "Rolled Ball Screw Non-Preload Type (Shaft Only) TS"
[ ! ] When selecting the shaft only, please choose one with the same screw shaft outer diameter and lead.

Specifications Table

· Example of part number configuration

Part number	Screw shaft Outer diameter d	Lead Ph	Ball center diameter dp	Root diameter dc	Number of Circuits under Load Rows × Turns	Standard rated load		Rigidity K N/μm	Nut dimensions
						Ca kN	C0a kN		Outer diameter D	Flange diameter D1	full length L1	H	B1	PCD	d1	Tw	Lubrication Hole		Seal M1
																	N1	A
BLK 1510-5.6	15	10	15.75	12.5	2 × 2.8	9.8	25.2	260	34	57	44	10	24	45	5.5	40	5	M6	3.5
BLK 1616-3.6	16	16	16.65	13.7	2 x 1.8	5.8	12.9	170	32	53	38	10	21.5	42	4.5	38	5	M6	3.5
BLK 1616-7.2	16	16	16.65	13.7	4 x 1.8	10.5	25.9	340	32	53	38	10	21.5	42	4.5	38	5	M6	3.5
BLK 2020-3.6	20	20	20.75	17.5	2 x 1.8	7.7	22.3	210	39	62	45	10	27.5	50	5.5	46	5	M6	3.5
BLK 2020-7.2	20	20	20.75	17.5	4 x 1.8	13.9	44.6	410	39	62	45	10	27.5	50	5.5	46	5	M6	3.5
BLK 2525-3.6	25	25	26	21.9	2 x 1.8	12.1	35	270	47	74	55	12	35	60	6.6	56	6	M6	3.5
BLK 2525-7.2	25	25	26	21.9	4 x 1.8	21.9	69.9	520	47	74	55	12	35	60	6.6	56	6	M6	3.5
BLK 3232-3.6	32	32	33.25	28.3	2 x 1.8	17.3	53.9	330	58	92	70	15	45	74	9	68	7.5	M6	3.8
BLK 3232-7.2	32	32	33.25	28.3	4 x 1.8	31.3	107.8	650	58	92	70	15	45	74	9	68	7.5	M6	3.8
BLK 3620-5.6	36	20	37.75	31.2	2 × 2.8	39.8	121.7	570	70	110	78	17	45	90	11	80	8.5	M6	5
BLK 3624-5.6	36	24	38	30.7	2 × 2.8	46.2	137.4	590	75	115	94	18	59	94	11	86	9	M6	5
BLK 3636-3.6	36	36	37.4	31.7	2 x 1.8	22.4	70.5	370	66	106	77	17	50	85	11	76	8.5	M6	5
BLK 3636-7.2	36	36	37.4	31.7	4 x 1.8	40.6	141.1	730	66	106	77	17	50	85	11	76	8.5	M6	5
BLK 4040-3.6	40	40	41.75	35.2	2 x 1.8	28.1	89.8	420	73	114	85	17	56.5	93	11	84	8.5	M6	5.4
BLK 4040-7.2	40	40	41.75	35.2	4 x 1.8	51.1	179.6	810	73	114	85	17	56.5	93	11	84	8.5	M6	5.4
BLK 5050-3.6	50	50	52.2	44.1	2 x 1.8	42.1	140.4	510	90	135	106	20	72	112	14	104	10	M6	5.4
BLK 5050-7.2	50	50	52.2	44.1	4 x 1.8	76.3	280.7	1,000	90	135	106	20	72	112	14	104	10	M6	5.4

Part number	Axial Clearance	Standard Shaft Length	Screw shaft Moment of inertia kg, m2/mm	Nut Weight kg	Axis Weight kg/m
BLK 1510-5.6	0.1	500, 1,000	3.90 x 10-8	0.26	1.16
BLK 1616-3.6	0.1	500, 1,000, 1,500	5.05 x 10-8	0.21	1.35
BLK 1616-7.2	0.1	500, 1,000, 1,500	5.05 x 10-8	0.25	1.35
BLK 2020-3.6	0.1	500, 1,000, 1,500	1.23 × 10-7	0.35	2.18
BLK 2020-7.2	0.1	500, 1,000, 1,500	1.23 × 10-7	0.35	2.18
BLK 2525-3.6	0.1	500, 1,000, 1,500, 2,000, 2,500	3.01 x 10-7	0.64	3.41
BLK 2525-7.2	0.1	500, 1,000, 1,500, 2,000, 2,500	3.01 x 10-7	0.64	3.41
BLK 3232-3.6	0.14	1,000, 1,500, 2,000, 2,500, 3,000	8.08×10-7	1.14	5.69
BLK 3232-7.2	0.14	1,000, 1,500, 2,000, 2,500, 3,000	8.08×10-7	1.14	5.69
BLK 3620-5.6	0.17	1,000, 1,500, 2,000, 2,500, 3,000	1.29 x 10-6	1.74	7.09
BLK 3624-5.6	0.17	1,000, 1,500, 2,000, 2,500, 3,000	1.29 x 10-6	2.42	7.02
BLK 3636-3.6	0.17	1,000, 1,500, 2,000, 2,500, 3,000	1.29 x 10-6	1.74	7.12
BLK 3636-7.2	0.17	1,000, 1,500, 2,000, 2,500, 3,000	1.29 x 10-6	1.74	7.12
BLK 4040-3.6	0.17	1,000, 1,500, 2,000, 2,500, 3,000, 4,000	1.97 x 10-6	2.16	8.76
BLK 4040-7.2	0.17	1,000, 1,500, 2,000, 2,500, 3,000, 4,000	1.97 x 10-6	2.16	8.76
BLK 5050-3.6	0.2	1,000 / 1,500 / 2,000 / 3,000 / 4,000	4.82×10-6	3.89	13.79
BLK 5050-7.2	0.2	1,000 / 1,500 / 2,000 / 3,000 / 4,000	4.82×10-6	3.86	13.79

[ ! ] Only a part of the lineup is available at MISUMI. Please use filtering criteria to confirm details.
   MISUMI does not support alteration, custom orders, or similar requests.

Note: When the QZ lubrication device is installed, the nut overall length dimension will increase. Please refer to the digital catalog for details.

Cautions and Prohibitions

Handling

(1) When transporting products weighing 20 kg or more, please use two or more people or use transport equipment. It may cause injury or damage.
(2) Do not disassemble any parts. It may cause loss of function.
(3) Note that, when a ball screw shaft or ball screw nut is tilted, it may be fallen out by its own weight.
(4) Do not drop or hit the ball screw. It may cause injury or damage. Also, please note that when shock was applied, the product may lose its function even though there is no visible damage to the external appearance.
(5) During assembly, make sure not to remove the ball screw nut from the ball screw shaft.
(6) When handling the product, wear protective gloves, safety shoes, and the like as necessary to ensure safety.

Precautions for use

(1) Be careful to prevent the entry of contaminants such as cutting chips or coolant. Otherwise, it may cause damage.
(2) If the product is used in environments where cutting chip, coolant, corrosive solvents, water, etc. may enter the interior, avoid entry into the product by using bellows, cover, or similar protection.
(3) Avoid using the product at temperatures exceeding 80°C. Except for heat resistant specifications, if this temperature is exceeded, resin and rubber parts may be deformed or damaged.
(4) If cutting chip or other contaminant adheres to the product, please clean it and then reapply lubricant.
(5) In cases of slight oscillation, it is difficult for an oil film to form on the contact surfaces between the rolling element and the rolling surface, which may cause fretting. Please use grease with excellent fretting resistance. In addition, we recommend periodically performing an operation equivalent to one rotation of the ball screw nut to form an oil film on the rolling surfaces and rolling elements.
(6) Do not forcibly drive positioning components (such as pins or keys) into the product. This may cause indentations on the rolling surfaces and result in loss of function.
(7) If there is any misalignment or tilting between the ball screw shaft support and the ball screw nut, the lifespan may become extremely short. Please pay close attention to the mounting components and assembly accuracy.
(8) If the rolling element falls out of the ball screw nut, do not use it as is.
(9) When using in a vertical axis, please take measures such as adding a safety mechanism to prevent falling. The ball screw nut may fall by its own weight.
(10) Do not use the product in excess of the allowable rotational speed. May lead to damage to parts or accidents. Please use within our specified rotating speed range.
(11) Do not let a ball screw nut overrun. This may cause balls to fall out, damage to circulation components, or indentations on the ball rolling surface, resulting in malfunction. In addition, continued use in this condition may lead to premature wear or damage to circulation components.
(12) When using the ball screw, please provide guide elements such as an LM guide or ball spline. It may cause damage.
(13) If the rigidity or accuracy of the mounting component is insufficient, the load on the bearing will be locally concentrated, and the bearing performance will be significantly reduced. Therefore, please thoroughly consider the rigidity and accuracy of the housing and base, as well as the strength of the fixing bolts.

Lubrication

(1) Wipe off the anti-rust oil thoroughly and fill with lubricant before use.
(2) Avoid mixing different lubricants. Even if the thickener is the same type of grease, differences in additives and other components may have adverse effects on each other.
(3) When used in special environments such as locations subject to constant vibration, clean rooms, vacuum, or extreme low or high temperatures, please use grease suitable for the specifications and environment.
(4) When lubricating products that do not have a grease fitting or oil hole, apply lubricant directly to the rolling surface and perform several break-in strokes to ensure grease enters the interior.
(5) The consistency of the grease changes depending on the temperature. Please note that changes in consistency will also affect the torque of the ball screw.
(6) After lubrication, the mixing resistance of the grease may cause the rotational torque of the ball screw to increase. Be sure to perform a break-in operation and allow the grease to fully blend in before operating the machine.
(7) Immediately after greasing, excess grease may scatter around the area, so please wipe it off as needed before use.
(8) The properties of grease deteriorate and its lubrication performance declines over time, so it is necessary to inspect and replenish the grease according to usage frequency.
(9) The lubrication interval may vary depending on the usage conditions and operating environment, but as a reference, please lubricate every 100 km of travel (every 3 to 6 months). Please determine the final lubrication interval and amount based on actual machine operation.
(10) Depending on the mounting orientation and the lubrication port of the nut, the lubricant may not circulate properly, resulting in insufficient lubrication. Please consider this carefully during the design stage.
(11) When using a ball screw, it is necessary to ensure proper lubrication. If used without lubrication, wear on the rolling parts may increase and cause premature lifespan reduction. The reference amount of lubrication is indicated in the digital catalog.

Storage

Store ball screws in our packaging and shipping configuration, avoiding high temperatures, low temperatures, and high humidity, and keep them in a horizontal position indoors.
For products stored for a long period, the internal lubricant may have deteriorated over time, so please replenish the lubricant before use.

Disposal

Please dispose of the product appropriately as industrial waste.

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