Ball Plungers / Long (NSJL12)

 

Type			Body			Ball		Spring	Spacer	Operating Temperature
			[M] Material	[H] Hardness	[S] Surface Treatment	[M] Material	[H] Hardness	[M] Material	[M] Material
Metal Ball	Ultra Light Load	BPSL	EN 1.7220 Equiv.	29 to 35HRC	Black Oxide	EN 1.3505 Equiv.	55HRC or more	JIS−SWP−B	EN 1.4301 Equiv.	−30 to 80°C
	Light Load	BPJL
	Heavy Load	BSJL	EN 1.4301 Equiv.	—	—
	Extra Heavy Load	BPWL	EN 1.7220 Equiv.	29 to 35HRC	Electroless Nickel Plating
Plastic Ball	Ultra Light Load	NPSL			Black Oxide	Polyacetal	—		Brass
	Light Load	NPJR
	Heavy Load	NSJL
	Extra Heavy Load	NSWL			Electroless Nickel Plating

 

Part Number		Metal Ball		Plastic Ball		L	ℓ	B	Ultra Light Load (BPSL·NPSL)		Light Load (BPJL·NPJR)		Heavy Load (BSJL·NSJL)		Extra Heavy Load (BPWL·NSWL)
Type	M (Coarse Thread)	d	S	d	S				Load (N)		Load (N)		Load (N)		Load (N)
									min.	max.	min.	max.	min.	max.	min.	max.
Metal Ball BPSL BPJL BSJL BPWL Plastic Ball NPSL (* only) NPJR (* only) NSJL (* only) NSWL (* only)	3	1.5	0.5	—	—	13	1	1.5	0.3	0.64	1	2	1.5	2.9	2.2	5
	* 4	2.5	0.8	2.4	0.7	15	1.5	2	0.6	1.6	2	4.9	3.9	9.8	2.5	12.6
	* 5	3		3	0.8	18	2	2.5	1	3.12	2.9	9.8	4.9	19.6	11.7	25.1
	* 6	3		3	0.8	20	2.5	3	1.6	4.85	4.9	14.7	9.8	29.4	18.7	35.3
	* 8	4	1	4	1	23	2.5	4	2.4	6.36	6.9	19.6	12.7	39.2	24.5	46.8
	* 10	5	1.2	5	1.2	27	3	5	3	8.1	8.8	24.5	18.6	49	26.7	58.7
	* 12	7.1	1.8	7	1.8	32	3	6	3.5	9.68	9.8	29.4	19.6	58.8	26.1	62.3
	* 16	9.5	2.5	9.5	2.5	40	3	8	5.7	15.8	15.7	49	29.4	98	55.4	116

[!] M3 and M4 have no slits for a wrench on the tip. It can be installed only by using a hex socket.
[ ! ] Min. load is the initial load, and max. load is the one when the tip is fully compressed.
kgf = N × 0.101972