Machinists' Jacks | McMaster-Carr

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Height

Saddle Movement

Body Material

Weight Capacity

1,000 lb. to 2,999 lb.

3,000 lb. to 9,999 lb.

10,000 lb. to 19,999 lb.

20,000 lb. or greater

Base Width

Travel Length

Screw Jack Orientation

Material

Lifting Screw Material

304 Stainless Steel

Steel

RoHS

Compliant

Travel Distance per Turn

Mounting Position

REACH

Body Length

Export Control Classification Number (ECCN)

EAR99

Number of Mounting Holes

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Thread Size

Lifting Screw Thread Size

DFARS Specialty Metals

Exempt

Body Width

4 1/8"

Mounting Hole Location

Lift

Saddle Swivel Angle

Saddle Diameter

158 Products

Wrench-Adjustable Screw Jacks


Rigid Saddle	Swivel Saddle

Use these low-profile jacks in confined spaces. The screw adjustment lets you make small changes to the height of your load.

Warning: Never use to support people or loads over people.

Swivel Saddle—Jacks with swivel saddle keep loads from slipping. Also known as planer jacks, they have a side locking screw that keeps the jack extended and prevents lowering due to vibration.

Rigid Saddle—Jacks with rigid saddle are also known as spreader jacks.

				Saddle
	Weight Capacity	Ht.	Max. Lift	Type	Dia.	Swivel Angle	Base Wd.	Body Material		Each
Rigid Saddle



		3 ton/6,000 lb.	3" to 4"	1"	Flat	1 1/2"	—	2"	Steel	2915T21	0000000


		Swivel Saddle



				2 ton/4,000 lb.	2 3/4" to 3 3/4"	1"	Flat	1 1/4"	25°	2 3/8"	Iron	8791T6	000000


				4 ton/8,000 lb.	3 3/4" to 5 1/4"	1 1/2"	Flat	1 3/4"	25°	3 1/8"	Iron	8791T5	000000
				6 ton/12,000 lb.	5 1/4" to 7 1/2"	2 1/4"	Flat	2 1/8"	25°	4"	Iron	8791T7	000000
				8 ton/16,000 lb.	7 1/2" to 11 1/2"	4"	Flat	2 1/2"	25°	5 3/8"	Iron	8791T8	000000

Bar-Adjustable Screw Jacks

Shown with Turning Bar

The turning bar (sold separately) gives you leverage to lift heavier loads than wrench-adjustable screw jacks. The screw adjustment lets you make small changes to the height of your load. The saddle swivels to keep loads from slipping. The jack head has multiple openings so you can choose the best angle for inserting the turning bar.

Warning: Never use to support people or loads over people.

				Saddle
	Weight Capacity	Ht.	Max. Lift	Type	Dia.	Swivel Angle	Base Dia.	Body Material		Each
Swivel Saddle



		12 ton/24,000 lb.	9 5/8" to 13 3/8"	3 3/4"	Flat	2 7/8"	9°	4 3/4"	Iron	2926T13	0000000


		12 ton/24,000 lb.	11 5/8" to 17 3/8"	5 3/4"	Flat	2 7/8"	9°	5 1/2"	Iron	2926T14	000000
		12 ton/24,000 lb.	15 3/4" to 25 1/2"	9 3/4"	Flat	2 7/8"	9°	6 1/4"	Iron	2926T16	000000
		20 ton/40,000 lb.	11 7/8" to 16 7/8"	5"	Flat	3 1/8"	9°	6"	Iron	2926T18	000000
		20 ton/40,000 lb.	13 3/4" to 20 3/4"	7"	Flat	3 1/8"	9°	6 1/2"	Iron	2926T19	000000
		20 ton/40,000 lb.	15 3/4" to 24 3/4"	9"	Flat	3 1/8"	9°	6 3/4"	Iron	2926T21	000000
		24 ton/48,000 lb.	17" to 25 1/4"	8 1/4"	Flat	3 1/4"	9°	7 1/4"	Iron	2926T24	000000
		24 ton/48,000 lb.	23" to 37 1/4"	14 1/4"	Flat	3 1/4"	9°	8 1/2"	Iron	2926T27	000000

Jack Turning Bars

		Each
24" Long Turning Bar for 12 tons (24,000 lbs.) Capacity Jacks	2926T42	000000
42" Long Turning Bar for 24 tons (48,000 lbs.) Capacity Jacks	2926T44	000000
36" Long Turning Bar for 20 tons (40,000 lbs.) Capacity Jacks	2926T43	00000

Acme Screw Jacks

Top View

Broad, strong Acme threads make these screw jacks better than ball screw jacks for heavy loads, intermittent positioning applications, and where vibration is present. Screw jacks come assembled, threaded, and ready for hookup. Connect a motor or hand-crank shaft to the screw jack shaft to lift, hold, position, and level loads.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a load moves with one revolution of the shaft.

					Keyway			Body			Tube			Attachment Thread
	Travel Lg.	Lifting Screw Thread Size	Travel Distance per Turn	Shaft Dia.	Lg.	Wd.	Dp.	Lg.	Wd.	Dp.	Lg.	Dia.	Bearing Thk.	Lg.	Size	Input Starting Torque @ Input Speed		Each
Upright Screw Jack







				250 lb. Capacity—Carbon Steel Lifting Screw

				3"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	—	1 1/2"	1/2"-20	7 in·lbf @ 500 rpm	5945K11	0000000


				6"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	—	1 1/2"	1/2"-20	7 in·lbf @ 500 rpm	5945K12	000000
				9"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	—	1 1/2"	1/2"-20	7 in·lbf @ 500 rpm	5945K13	000000
				12"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	—	1 1/2"	1/2"-20	7 in·lbf @ 500 rpm	5945K14	000000




						500 lb. Capacity—304 Stainless Steel Lifting Screw

						3"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	—	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K15	000000


						6"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	—	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K16	000000
						9"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	—	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K17	000000
						12"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	—	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K18	000000




								1,000 lb. Capacity—304 Stainless Steel Lifting Screw

								3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 3/8"	27/32"	—	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K19	000000


								6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 3/8"	27/32"	—	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K21	000000
								9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 3/8"	27/32"	—	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K22	000000
								12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 3/8"	27/32"	—	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K23	000000




										2,000 lb. Capacity—Carbon Steel Lifting Screw

										4"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	3 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K151	000000


										5"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	4 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K191	000000
										6"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	5 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K152	000000
										8"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	7 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K153	000000
										10"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	9 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K154	000000
										12"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	11 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K155	000000
										14"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	13 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K156	000000
										16"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	15 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K157	000000
										18"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	17 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K158	000000
										20"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	19 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K159	000000
										24"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	23 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K111	000000


										30"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	29 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K112	000000
										36"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	35 7/8"	1 5/16"	—	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K113	000000




										4,000 lb. Capacity—Carbon Steel Lifting Screw

										4"	1"-4	0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	3 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K251	000000


		6"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	5 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K252	000000
		8"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	7 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K253	000000
		10"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	9 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K254	000000
		12"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	11 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K255	000000
		14"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	13 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K256	000000
		16"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	15 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K257	000000
		18"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	17 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K258	000000
		20"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	19 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K259	000000
		24"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	23 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K124	000000
		30"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	29 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K125	000000


		36"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	4 1/8"	7"	5"	35 3/4"	1 21/32"	—	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K126	00000000




				10,000 lb. Capacity—Carbon Steel Lifting Screw

				4"	1 1/2"-2 2/3					0.063"	3/4"	1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	3 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K451	00000000


				5"	1 1/2"-2 2/3					0.063"	3/4"	1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	4 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K452	00000000
				8"	1 1/2"-2 2/3	0.063"				3/4"	1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	7 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K453	00000000
				10"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	9 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K454	00000000
				12"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	11 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K455	00000000
				14"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	13 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K456	00000000
				16"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	15 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K457	00000000
				18"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	17 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K458	00000000
				20"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	19 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K459	00000000
				24"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	23 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K711	00000000
				30"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	29 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K712	00000000


				36"	1 1/2"-2 2/3	0.063"	3/4"			1 7/16"	3/16"	3/32"	5 1/2"	6"	8"	35 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K713	00000000
				72"	1 1/2"-2 2/3	0.063"	3/4"	1 7/16"		3/16"	3/32"	5 1/2"	6"	8"	71 3/4"	2 3/8"	—	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K751	00000000


				Inverted Screw Jack







								250 lb. Capacity—Carbon Steel Lifting Screw

								3"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 5/8"	1/2"-20	7 in·lbf @ 500 rpm	5945K24	000000


								6"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 5/8"	1/2"-20	7 in·lbf @ 500 rpm	5945K25	000000
								9"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 5/8"	1/2"-20	7 in·lbf @ 500 rpm	5945K26	000000
								12"	1/2"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 5/8"	1/2"-20	7 in·lbf @ 500 rpm	5945K27	000000




	500 lb. Capacity—304 Stainless Steel Lifting Screw

	3"								5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K28	000000


	6"								5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K29	000000
	9"								5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K31	000000
	12"								5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in·lbf @ 500 rpm	5945K32	000000




										1,000 lb. Capacity—304 Stainless Steel Lifting Screw

										3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 3/8"	7/8"	1/4"	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K33	000000


										6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 3/8"	7/8"	1/4"	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K34	000000
										9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 3/8"	7/8"	1/4"	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K35	000000
										12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 3/8"	7/8"	1/4"	1"	3/8"-24	30 in·lbf @ 500 rpm	5945K36	000000




										2,000 lb. Capacity—Carbon Steel Lifting Screw

										4"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	3 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K161	000000


										6"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	5 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K162	000000
										8"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	7 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K163	000000
										10"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	9 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K164	000000
										12"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	11 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K165	000000
										14"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	13 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K166	000000
										16"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	15 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K167	000000
										18"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	17 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K168	000000
										20"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	19 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K169	000000
										24"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	23 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K114	000000
										30"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	29 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K115	000000


										36"	3/4"-5	0.04"	1/2"	1"	1/8"	1/16"	3 5/16"	5"	3 31/32"	35 7/8"	1 5/16"	1/4"	3/4"	1/2"-13	76 in·lbf @ 500 rpm	62255K116	000000




				4,000 lb. Capacity—Carbon Steel Lifting Screw

				4"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	3 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K261	000000


				6"	1"-4							0.042"	1/2"	1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	5 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K262	000000
				8"	1"-4	0.042"						1/2"	1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	7 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K263	000000
				10"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	9 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K264	000000
				12"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	11 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K265	000000
				14"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	13 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K266	000000
				16"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	15 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K267	000000
				18"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	17 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K268	000000
				20"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	19 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K269	000000
				24"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	23 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K127	000000
				30"	1"-4	0.042"	1/2"					1 3/16"	1/8"	1/16"	3 3/4"	7"	5"	29 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K128	000000


36"				1"-4	0.042"	1/2"	1 3/16"					1/8"	1/16"	3 3/4"	7"	5"	35 3/4"	1 21/32"	5/16"	1 1/16"	5/8"-18	164 in·lbf @ 500 rpm	62255K129	00000000




					10,000 lb. Capacity—Carbon Steel Lifting Screw

					4"	1 1/2"-2 2/3	0.063"	3/4"				1 7/16"	3/16"	3/32"	5"	6"	8"	3 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K461	00000000


					6"	1 1/2"-2 2/3	0.063"	3/4"				1 7/16"	3/16"	3/32"	5"	6"	8"	5 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K462	00000000
	8"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"				3/16"	3/32"	5"	6"	8"	7 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K463	00000000
	10"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"				3/16"	3/32"	5"	6"	8"	9 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K464	00000000
	12"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"				3/16"	3/32"	5"	6"	8"	11 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K465	00000000
	14"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	13 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K466	00000000
	16"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	15 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K467	00000000
	18"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	17 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K468	00000000
	20"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	19 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K469	00000000
	24"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	23 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K714	00000000
	30"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	29 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K715	00000000


	36"				1 1/2"-2 2/3	0.063"	3/4"	1 7/16"	3/16"			3/32"	5"	6"	8"	35 3/4"	2 3/8"	1/2"	1 1/2"	1"-14	650 in·lbf @ 300 rpm	62255K716	00000000

Accessories for Jacks

Mounting Plates

Add a flat mounting surface to a screw jack to support loads. Plates rotate in unison with the lifting screw.

		Mounting Plate		Mounting Hole
For Screw Jack Cap., lb.	Thread Size	Dia.	Thick.	Ctr.-to-Ctr.	Dia.	No. of		Each
2,000	1/2"-13	3 1/2"	3/8"	2 1/2"	7/16"	4	62255K91	000000
4,000	5/8"-18	4 1/4"	7/16"	3"	13/32"	4	62255K92	00000
10,000	1"-14	4 1/2"	5/8"	3"	11/16"	4	62255K93	000000

Eyelet End Fittings

Image of Product. Front orientation. Contains Annotated. Screw Jack End Fittings. Acme Screw Jacks.

Attach these fittings to the end of a screw jack to create pivoting connections with clevis rod ends and other linkages. Fittings rotate in unison with the lifting screw.

For Screw Jack Cap., lb.	Thread Size	For Jaw Opening Wd.	For Pin Dia.	Lg.		Each
2,000	1/2"-13	1/2"	5/16"	1 13/16"	62255K71	000000
4,000	5/8"-18	1"	5/8"	2 1/2"	62255K72	00000
10,000	1"-14	1 1/4"	1"	4 1/2"	62255K73	000000

Acme Screw Jacks with Mounting Plate

Top View

The mounting plate provides a flat surface for supporting loads. Broad, strong Acme lead screw threads make these screw jacks good for heavy loads, intermittent positioning applications, and where vibration is present. Connect a motor or hand-crank shaft to the screw jack shaft to lift, hold, position, and level loads. Screw jacks come assembled, threaded, and ready for hookup.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a load moves with one revolution of the shaft.

					Keyway			Body			Tube			Mounting Plate Mounting Holes
	Travel Lg.	Lifting Screw Thread Size	Travel Distance per Turn	Shaft Dia.	Lg.	Wd.	Dp.	Lg.	Wd.	Dp.	Lg.	Dia.	Bearing Thk.	Ctr.-to-Ctr.	Dia.	No. of	Input Starting Torque @ Input Speed		Each
Upright Screw Jack







				250 lb. Capacity—304 Stainless Steel Lifting Screw

				3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	—	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K37	0000000


				6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	—	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K38	000000
				9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	—	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K39	000000
				12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	—	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K41	000000




						500 lb. Capacity—304 Stainless Steel Lifting Screw

						3"	5/8"-8	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	—	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K42	000000


						6"	5/8"-8	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	—	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K43	000000
						9"	5/8"-8	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	—	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K44	000000
						12"	5/8"-8	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	—	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K45	000000




								1,000 lb. Capacity—304 Stainless Steel Lifting Screw

								3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 3/8"	7/8"	—	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K46	000000


								6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 3/8"	7/8"	—	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K47	000000
								9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 3/8"	7/8"	—	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K48	000000
								12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 3/8"	7/8"	—	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K49	000000


								Inverted Screw Jack







												250 lb. Capacity—304 Stainless Steel Lifting Screw

												3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K51	000000


												6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K52	000000
												9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K53	000000
												12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	12 in·lbf @ 500 rpm	5945K54	000000




														500 lb. Capacity—304 Stainless Steel Lifting Screw

														3"	5/8"-8	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K55	000000


6"	5/8"-8													0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K56	000000
9"	5/8"-8													0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K57	000000
12"	5/8"-8													0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in·lbf @ 500 rpm	5945K58	000000




		1,000 lb. Capacity—304 Stainless Steel Lifting Screw

		3"	5/8"-8											0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K59	000000


		6"	5/8"-8											0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K61	000000
		9"	5/8"-8											0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K62	000000
		12"	5/8"-8											0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in·lbf @ 500 rpm	5945K63	000000

Ball Screw Jacks


Upright Screw Jack	Inverted Screw Jack	Top View

Low-friction ball bearings allow these screw jacks to use half the power required by an Acme screw jack to lift the same load. Typically used as actuators, they run at higher speeds than Acme screw jacks. They come assembled, threaded, and ready for hookup. Connect a motor or hand-crank shaft to the screw jack shaft to lift, hold, position, and level loads.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a load moves with one revolution of the shaft.

					Keyway			Body			Tube		Attachment Thread
	Travel Lg.	Lifting Screw Dia.	Travel Distance per Turn	Shaft Dia.	Lg.	Wd.	Dp.	Lg.	Wd.	Dp.	Lg.	Dia.	Lg.	Size	Input Starting Torque @ Input Speed		Each
Upright Screw Jack







				4,000 lb. Capacity—Alloy Steel Lifting Screw

				3"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	3 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T421	000000000


				6"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	6 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T422	00000000
				9"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	9 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T423	00000000
				12"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	12 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T424	00000000
				18"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	18 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T425	00000000
				24"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	24 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T426	00000000


				Inverted Screw Jack







								4,000 lb. Capacity—Alloy Steel Lifting Screw

								3"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	3 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T521	00000000


								6"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	6 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T522	00000000
								9"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	9 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T523	00000000
								12"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	12 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T524	00000000
								18"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	18 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T525	00000000
								24"	1"	0.042"	1/2"	1"	1/8"	1/16"	5 5/8"	4 1/8"	6 1/4"	24 3/4"	1 21/32"	1 1/8"	3/4"-16	50 in·lbf @ 1,750 rpm	1410T526	00000000

Accessories for Jacks

Mounting Plates

Image of Product. Front orientation. Contains Annotated. Screw Jack Mounts. Ball Screw Jacks.

Add a flat mounting surface to a ball screw jack to support loads. Plates rotate in unison with the lifting screw.

		Mounting Plate		Mounting Hole
For Screw Jack Cap., lb.	Thread Size	Dia.	Thick.	Ctr.-to-Ctr.	Dia.	No. of		Each
4,000	3/4"-16	4 1/4"	7/16"	3"	13/32"	4	1410T73	0000000

Eyelet End Fittings

Image of Product. Front orientation. Contains Annotated. Screw Jack End Fittings. Ball Screw Jacks.

Attach these fittings to the end of a ball screw jack to create pivoting connections with clevis rod ends and other linkages. Fittings rotate in unison with the lifting screw.

For Screw Jack Cap., lb.	Thread Size	For Jaw Opening Wd.	For Pin Dia.	Lg.		Each
4,000	3/4"-16	1"	1/2"	3"	1410T74	0000000

Mounts for Acme Screw Jacks

Add a flat mounting surface to a screw jack to support loads. Plates rotate in unison with the lifting screw.

		Mounting Plate		Mounting Holes
For Screw Jack Cap., lb.	Thread Size	Dia.	Thk.	Ctr.-to-Ctr.	Dia.	No. of		Each
2,000	1/2"-13	3 1/2"	3/8"	2 1/2"	7/16"	4	62255K91	000000
4,000	5/8"-18	4 1/4"	7/16"	3"	13/32"	4	62255K92	00000
10,000	1"-14	4 1/2"	5/8"	3"	11/16"	4	62255K93	000000

Mounts for Ball Screw Jacks

Add a flat mounting surface to a ball screw jack to support loads. Plates rotate in unison with the lifting screw.

		Mounting Plate		Mounting Holes
For Screw Jack Cap., lb.	Thread Size	Dia.	Thk.	Ctr.-to-Ctr.	Dia.	No. of		Each
4,000	3/4"-16	4 1/4"	7/16"	3"	13/32"	4	1410T73	0000000