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Ellis Screw Jacks

bridge jack 6x6 screw jack 4x4 screw jack mini jack
Bridge Jack 6x6 Screw Jack 4x4 Screw Jack Mini Jack

 

screw jack dimensions

For a rugged and durable piece of hardware in the Ellis line, none get it done like the Ellis Bridge Jack / Modular Building Jack. With top and bottom plates measuring 1/2x 8x8 inch (BJ-3) or 1/2 x 9 x 9 inch (BJ-6 & BJ-12) for support, the Acme Screw is 2 and a 1/2 inch in diameter and greased for easy turning and capable of extending a full 2.5in (BJ-3), 5in (BJ-6) or 11in (BJ-12).  For extra leverage, a 1 inch steel rod can also be used when turning Bridge Jack Testthe screw. The Ellis Bridge Jacks while weighing 45 lbs. (BJ-3), 60lbs (BJ-6) and 70lbs (BJ-12) can support loads up to 80,000 lbs.  The top plate has been attached to swivel freely, allowing the screw to be turned with ease. For added support, gussets on the top and the bottom plate have been added with full length welds.  Also, 4 - 9/16 inch  holes (spaced 1-1/2 inch OC from each edge) have been added to the Base and Top Plates to make securing it easy.
 
We tested the Bridge Jacks to over 200,000 lbs. before failure occurred!  Pictured right is the BJ-6 inside the testing lab.

Although the Bridge Jacks were tested to over 200,000 lbs., we recommend applying a 2.5 to 1 safety factor when gauging the load capacity of these jacks.  Therefore, DO NOT EXCEED 80,000 lbs. with either of the two Bridge Jacks. With this kind of hardware, it's no surprise that the Ellis Bridge Jack / Modular Building Jack can support loads up to 80,000 pounds. A favorite of contractors, they fit directly under concrete slabs or beams in tight spots, under homes or modular buildings as well as with timbers for shoring projects. Just install the Bridge Jack at its closed height of 10in (BJ-3), 13in (BJ-6) or 19in (BJ-12) and use the 2.5in (BJ-3),  5in (BJ-6) or 11in (BJ-12) of adjustment to screw it into position. 

Search and Rescue teams also know the value of the Ellis Bridge Jack. With it's ability to fit in tight spaces to stabilize concrete slabs or steel beams, the Ellis Bridge Jack is a versatile tool for downed buildings and reinforcement in small areas. It is strength in a small package, when time is of the essence.

Models
Item Number Item Name Weight
BJ-3 Bridge Jack 10 - 12.5 inch 45.0 lbs.
BJ-6 Bridge Jack 13 - 18 inch 60.0 lbs.
BJ-12 Bridge Jack 19 - 30 inch 70.0 lbs.

 

Ellis 4x4 Screw Jack (SJ-4 or SJ-4G)

Specifications:

  • 15,000 Lb. Load Capacity!
  • For Vertical / Horizontal Support.
  • Galvanized or Painted Finish.
  • Use Standard with Dressed 4x4 Lumber.
  • 14.25" Overall Height (screwed down).
  • Full 6" Adjustment.
  • Turn "U" Shaped Handle to Adjust Height
  • Screw is Greased for easy tuning and to prevent rusting.
  • Base Plate will not turn with screw and 4 holes are provided to secure it to a solid foundation.
  • Proper bracing required Prevent lateral shifting.
  • Always Secure to a Solid Foundation.
Screw Jack 4x4
Lift up to 1800 lbs by hand or 4000 lbs. w/ a 2x4x6' piece of lumber placed between screw and handle for extra leverage.
Caution, the acme screw of the 4x4 GALVANIZED Scre Jack will completely separate from the acme nut if screwed out too far.  Do not extend the acme screw  past the  maximum adjustment of 6 inch.  This will insure that the threads of the acme nut will be used to support a heavy load.

Ellis 6x6 Screw Jack (SJ-6 or SJ-6G)

Specifications:

  • 30,000 LB Load Capacity!
  • For Vertical / Horizontal Support.
  • Galvanized or Painted Finish.
  • Use Standard with Dressed 6x6 Lumber.
  • 15-1/2 inch Overall Height (screwed down).
  • Full 6 inch Adjustment.
  • Turn U Shaped Handle to Adjust Height
  • Screw is Greased for easy tuning and to prevent rusting.
  • Base Plate will not turn with screw and 4 holes are provided to secure it to a solid foundation.
  • Proper bracing required Prevent lateral shifting.
  • Always Secure to a Solid Foundation.
Ellis Screw Jack 6x6
Lift up to 1800 lbs by hand or 4000 lbs. w/ a 2x4x6' piece of lumber placed between screw and handle for extra leverage.
Caution, the acme screw of the 4x4 GALVANIZED Scre Jack will completely separate from the acme nut if screwed out too far.  Do not extend the acme screw past the maximum adjustment of 6 inch.  This will insure that the threads of the acme nut will be used to support a heavy load.
Models
Item Number Item Name Weight
SJ-4 Screw Jack 4x4 (Painted Finish) 12 lbs.
SJ-4G Screw Jack 4x4 (Galvanized Finish) 12 lbs.
SJ-6 Screw Jack 6x6 (Painted Finish) 22 lbs
SJ-6G Screw Jack 6x6 (Galvanized Finish) 22 lbs.
TJ-4 Timber Jack  (15,000 Lb. Capacity) 10 lbs.
TJ-6 Timber Jack  (30,000 Lb. Capacity) 10 lbs.

 

Elllis Mini Jack 2.5 inch Adj. (MJ-3)
Load Capacity: 15,000 Lbs / 7.5 Tons (Includes 2.5 to 1 Factor of Safety)
Overall Height Screwed Down: 6-1/2 inch
Overall Height Fully Extended: 9 inch
Base Plate 4 inch Sq.
Top Plate: 4 inch Sq. (Swivels Independently from Screw)
Acme Screw Size: 1-1/4 inch
Range of Adustment: 2.5 inch
Lifting Capacity: 3,000 LBS. w/ 12 inch turning bar (MJ-TB12).
midget jack mini jack
Ellis Mini Jack 5.5 inch Adj. (MJ-6)
Load Capacity: 15,000 Lbs / 7.5 Tons (Includes 2.5 to 1 Factor of Safety)
Overall Height Screwed Down: 9-1/2 inch
Overall Height Fully Extended: 15 inch
Base Plate 4 inch Sq.
Top Plate: 4 inch Sq. (Swivels Independently from Screw)
Acme Screw Size: 1-1/4 inch
Range of Adustment: 5.5 inch
Lifting Capacity: 3,000 LBS. w/ 12 inch turning bar (MJ-TB12).
mj-6 mj-6 diagram
Make adjustments to the height of the Mini Jack by turning the turning wheel. A 3/4 inch round rod can be used for extra leverage (MJ-TB12). Top plate will swivel independently from the screw. 
Model
Item Number Item Name Weight
MJ-3 Mini Screw Jack 2.5 inch Adjustment  NEW   8 lbs.
MJ-6 Mini Screw Jack 5.5 inch Adjustment  NEW  11 lbs.

 

There are no listed accessories.

BJ-3
BRIDGE JACK 3 ADJUSTMENT - WEIGHT = 50 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: BJ-3
ELLBJ-3
Call for freight quote on this item or we will confirm freight charges before shipping.1
$176.80

469
BJ-6
BRIDGE JACK 6 ADJUSTMENT - WEIGHT = 60 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: BJ-6
ELLBJ-6
Call for freight quote on this item or we will confirm freight charges before shipping.1
$203.11

469
BJ-12
BRIDGE JACK 12 ADJUSTMENT - WEIGHT = 70 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: BJ-12
ELLBJ-12
Call for freight quote on this item or we will confirm freight charges before shipping.1
$238.89

469
SJ-4
SCREW JACK 4X4 (PAINTED FINISH) - WEIGHT = 13 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: SJ-4
ELLSJ-4
Call for freight quote on this item or we will confirm freight charges before shipping.1
$52.62

469
SJ-4G
SCREW JACK 4X4 (GALVANIZED FINISH) - WEIGHT = 13 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: SJ-4G
ELLSJ-4G
Call for freight quote on this item or we will confirm freight charges before shipping.1
$58.93

469
SJ-6
SCREW JACK 6X6 - WEIGHT = 22 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: SJ-6
ELLSJ-6
Call for freight quote on this item or we will confirm freight charges before shipping.1
$72.61

469
SJ-6G
SCREW JACK 6X6 (GALVANIZED FINISH) - WEIGHT = 22 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: SJ-6G
ELLSJ-6G
Call for freight quote on this item or we will confirm freight charges before shipping.1
$78.93

469
TJ-4
TIMBER JACK∆15,000 LB.∆CAPACITY∆∆∆∆∆∆∆∆ - WEIGHT = 10 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: TJ-4
ELLTJ-4
Call for freight quote on this item or we will confirm freight charges before shipping.1
$42.09

469
TJ-6
TIMBER JACK 30,000 LB. CAPACITY - WEIGHT = 14 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: TJ-6
ELLTJ-6
Call for freight quote on this item or we will confirm freight charges before shipping.1
$47.36

469
MJ-3
MINI JACK 2.5 ADJUSTMENT - WEIGHT = 8 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: MJ-3
ELLMJ-3
Call for freight quote on this item or we will confirm freight charges before shipping.1
$46.30

469
MJ-6
MINI JACK 5.5 ADJUSTMENT - WEIGHT = 11 LBS
VOLUME PRICING AVAILABLE CALL 1-800-458-3687 X1
Mfg. item #: MJ-6
ELLMJ-6
Call for freight quote on this item or we will confirm freight charges before shipping.1
$57.88

469
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