Line Boring Machine T8120*20/T8120SF/LB2300
This line boring machine range bores the master bushing and cam bushing bores in the cylinder bodies of engines and generators used in automobiles, tractors and ships. Where a bore line has worn or a bush seat has been damaged, the machine restores it in one setup rather than leaving the block to be scrapped or shimmed...
What This Machine Does
This line boring machine range bores the master bushing and cam bushing bores in the cylinder bodies of engines and generators used in automobiles, tractors and ships. Where a bore line has worn or a bush seat has been damaged, the machine restores it in one setup rather than leaving the block to be scrapped or shimmed. Where needed, the flywheel hub bore and the bushing seat hole can also be finely bored on the same machine. XAIMC developed these machines in its own factory for high-efficiency high-precision repair work on large blocks. To cut auxiliary hours and reduce how much the job depends on operator skill, a set of accessories is available with the main machine: centring devices, a rectifying tool, an inner diameter measuring device, a boring rod bracket, a tool holder for increasing diameter, a boring tool micro-adjuster and a distance tool rectifying device. The LB2300 covers bore lines up to 2300 mm.
Why Buyers Choose This Machine
- Bores master bushing and cam bushing bores in one setup so the bore line stays true to itself
- Flywheel hub bore and bushing seat hole can also be finely bored on the same machine
- Accessory set for centring measuring and micro-adjustment cuts auxiliary hours off every job
- Boring tool micro-adjuster lets the operator dial final size instead of creeping up on it by trial cuts
- Boring rod bracket supports long bars so deflection does not open out the far end of the line
- Covers large automobile tractor ship and generator cylinder bodies including the 2300 mm LB2300
- Inner diameter measuring accessory keeps size checking on the machine rather than on the bench
Where Line Boring Machine T8120*20 Earns Its Place
Problems It Solves
- A worn master bushing bore line will not hold new bushes concentric and the engine wears again quickly
- Setting up a long bore line by eye burns hours before any metal is cut
- Long boring bars deflect and taper the bore unless they are supported
- Creeping up on final bore size by repeated trial cuts wastes time and risks going oversize
- Large blocks exceed the capacity of compact repair boring machines
- Measuring the bore off the machine means breaking and re-establishing the setup
Who It Is For
- Heavy engine rebuilders working on truck tractor and marine blocks
- Generator set service workshops reconditioning cylinder bodies
- Machine shops that take in large bore line work as a subcontract service
- Fleet and plant workshops rebuilding their own heavy engines
- Distributors equipping heavy-engine rebuild lines in export markets
Application Scenarios
- Reboring worn master bushing bores in heavy truck and tractor cylinder bodies
- Machining cam bushing bores after fitting new bushes
- Fine boring a flywheel hub bore on an engine block
- Recovering a damaged bushing seat hole rather than scrapping the block
- Bore line work on marine and stationary generator engines
- Long bore line work up to 2300 mm on the LB2300
Technical Detail
Technical Features
- Boring of master bushing and cam bushing bores in engine and generator cylinder bodies
- Fine boring of flywheel hub bore and bushing seat hole where required
- Centring accessory and rectifying tool for fast setup
- Inner diameter measuring device for on-machine size checking
- Boring rod bracket to support long boring bars
- Tool holder for increasing boring diameter
- Boring tool micro-adjuster for final size setting
- Distance tool rectifying device
Specifications
| Machine type | Line boring machine for engine and generator cylinder bodies |
|---|---|
| Models | T8120*20 / T8120SF / LB2300 |
| Related model | T8115B*16 cylinder body bushing boring machine |
| Applications | Master bushing bores cam bushing bores flywheel hub bore bushing seat hole |
| Engine types | Automobile tractor ship and generator engines |
| Accessories | Centring device rectifying tool inner diameter gauge boring rod bracket diameter-increasing tool holder boring tool micro-adjuster distance tool rectifying device |
| Bore line length | Up to 2300 mm on LB2300 |
Figures above are taken from the product information we hold. Send us your application and we will confirm the exact specification for the model quoted.
How It Is Built and What Can Be Changed
Operations Performed
- Line boring
- Fine boring
- Bush seat machining
Quality Control
- Boring bar alignment checked along the full bore line before the machine ships
- Spindle run-out measured on the assembled boring head
- Bore roundness and diameter verified on a test cut using the inner diameter measuring device
- Micro-adjuster repeatability checked through its adjustment range
- Machine run in and full function test carried out before crating
Customisation Options
- T8120*20 T8120SF or LB2300 chosen from the bore line length you work on
- Accessory package selected from the centring measuring bracket and micro-adjustment items
- Boring bars and tool holders specified for your bore diameter range
- Supply voltage and frequency set for your market
- Manual and machine labelling prepared in your working language
How It Compares With the Alternatives
| Line boring machine LB100 | The LB100 is the compact machine for middle and small blocks; this range is built for long heavy cylinder bodies including bore lines up to 2300 mm |
|---|---|
| Con-rod bushing boring machine T8216 / T8210D | The con rod machine handles the small end and rod bushes; this machine bores the block's own master and cam bushing bore line |
| Hand-fitting oversized bushes | Hand fitting cannot hold concentricity along a long bore line; boring the line on this machine gives a single true axis for every bush |
Running the Machine
Step 1
Mount the cylinder body and use the centring accessory to set the bore line to the boring bar
Step 2
Fit the boring rod bracket where the bar is long enough to deflect
Step 3
Set the boring tool with the micro-adjuster for the first cut
Step 4
Take a light pass and check the bore with the inner diameter measuring device
Step 5
Adjust with the micro-adjuster and bore to final size along the line
Step 6
Change to the diameter-increasing tool holder where a bush seat needs opening out
Step 7
Clean all swarf from the block before pressing in new bushes
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Questions About Line Boring Machine T8120*20
What is the difference between T8120*20 T8120SF and LB2300?
They cover different bore line lengths and configurations, with the LB2300 taking bore lines up to 2300 mm. Send us your longest cylinder body and we will confirm the model.
Can it bore the flywheel hub bore as well?
Yes. If necessary the flywheel hub bore and the bushing seat hole can also be finely bored on the machine.
What accessories come with the machine?
Accessories available with the main machine include centring, a rectifying tool, an inner diameter measuring device, a boring rod bracket, a tool holder to increase diameter, a boring tool micro-adjuster and a distance tool rectifying device. Tell us which you want quoted.
Can it be used with a cylinder body boring machine?
The range is developed alongside our cylinder body bushing boring machines including the T8115B*16. Tell us what you already have in the shop and we will advise how they work together.
What engines is the machine used on?
Cylinder bodies of engines and generators in automobiles, tractors and ships.
What are your payment and trade terms?
FOB CFR and CIF. Payment is 30 percent by T/T on order and 70 percent before shipment, or an irrevocable L/C at sight.
What is the lead time and how is it shipped?
Lead time depends on the model, accessory package and voltage. Machines are crated for sea freight; send us your destination port and we will quote FOB CFR or CIF with a shipment date.
Request a Quote on the Line Boring Machine T8120*20
Send us the work you need it to do, the voltage on your site and the port you ship to. We will come back with the model, the tooling and the lead time.