General Machining (10)
These shafts were made for a company in Northwest Indiana.
Specifications
Materials:
The shaft material was a forging of 4340 Pre-Hardened to 320 Brinnell. Bearing housings were made from a medium carbon plate burned to size.
Size:
The OD of the shaft is 8" x 23' long. The bearing boxes were machined from burned plate ranging from 6" to 12" thick. The shafts have keyways milled in various locations. The shafts were sent assembled, ready to be installed by the customer.
Quantities:
The order was for 2 pieces which we supplied to the customer. In addition to the shafts, we also machined and assembled 17 rolls that the shaft drives.
These shafts were made for a company in the Chicago area.
Specifications
Materials:
The material was a 4340 Pre-Hardened to 320 Brinnell. The customer supplied us with a smooth forged, with stock to finish
Size:
The largest outside diameter is 14.96 inches, the smallest is 12.59. The largest bore is 9.55 inches, the smallest is 5.91 inches. The overall length is 27.95" long. The keyway is 2.48 inches wide x 11.93 inches long. There is also a 0.78 inch wide groove on the face with threaded holes and a snap ring groove on the od.
Quantities:
The order was for 80 pieces which we supplied one piece per day, as was required for the customer.
Product Summary
This rotor was rebuilt for a company in the Chicago area. The shaft and spacer rings were reused to save time.
Specifications
Weight of assembly
Over 48,000 lbs.
Size of assembly
- Rings 61" diameter and 4" thick
- Largest diameter on shaft 16"
- Overall length 180"
Scope of work
- Remove coupling and bearings from rotor
- Disassemble old plates and spacers from rotor
- Visually inspect shaft for any cracks in rotor shaft
- Reverse engineer and create prints for future use
- Hardface all 11 plates
- Bore holes in plates
- Mill key in plates
- Drill all holes using key as reference
- Inspect assembly
- Assemble and load on truck for customer
Other related jobs
After removing the bearings, there was significant scoring in the housings, so the customer decided to reline the housings.
Above you see four different bushings. The two on the left side are 1/2 bushings that are used in sink roll arms. The two in the middle are a closed end sink roll bushing. These two are also carbide coated to give the roll a longer life in the zinc pot. The bushing on the right is an eccentric sink roll arm bushing.
In addition to these slip on bushing, we have customers that we build up journals with Cobalt Alloy or equivalent wire. The welded journal is then ground to size.
This is a sample of a drawing created for one of our customers. It is saved and held by J.K. Manufacturing for future reference.
When a product is worn out and in need of replacement, and no prints are available, we have the experience to disassemble the parts and see the way the parts work together.
Key Features
- Experience disassembling
We have the experience and equipment to take most products apart.
- CAD
After parts are disassembled, we create CAD "computer aided drafting" drawings of the parts. These drawings are then saved for future reference.
We use Cadkey to create our drawings. We can import/export *.prt, *.dwg, *.dxf and iges files. A E-size plotter means large drawings are not reduced to a point where drawings are illegible. Wherever possible, full size drawings can be used as templates. Plot files can be directly plotted without any problem. Contact us prior to sending any files.
- Technical knowledge
When parts are worn out, we can discuss with the customer to find the way the part was in the original condition.
Product Summary
The above picture shows an eyebolt assembly that we had worked on
Specifications
Materials:
The material came to JK Manufacturing as a forged piece of carbon steel
Size:
The overall length of the assembly is 9' from eye center to eye center.
Thread:
The bolts diameter is 6 1/2" and have 1 and 1 1/3 ACME threads.
Click on a picture below for better detail. A new window will pop up. Close window to return to this page
Product Summary
The above picture shows an Thrust Bar Gear Rack. Click on above pictures for better quality.
Specifications
Materials:
The material is 4140 plate that was flame cut and hardened to 280 Brinell.
Size:
3 3/4" x 7 " x 59" long
Gear Teeth:
30 teeth-4/5 DP. and flame hardened.
Product Summary
Tapered Cone. This cone has the OD and ID turned. This one shown is 59" in diameter and 26" high. Finished weight is just under 6000 pounds. Click on above pictures for better quality.
Specifications
Materials:
ASTM A148
Size:
Varies, from 40-59" OD x up to 26" high
Product Summary
Seal Ring. These rings have deep grooved machined into the face. Click on above pictures for better quality.
Specifications
Materials:
1040 Carbon steel
Size:
Varies, from 40-53" OD x up to 3" thick
