M18 Band Saw: Model Identification, Setup, and Common Repairs
You own a Milwaukee M18 band saw and you need to identify the exact model, order blades, or make repairs. You know it is an M18 saw but you are not sure which one. Milwaukee makes two M18 band saws: the compact and the deep cut. They look similar but use different blades and have different capacities. You need a guide that helps you identify your model and maintain it.
The Milwaukee M18 band saw lineup includes two types: the compact and the deep cut. Both run on M18 batteries, but they are different tools with different blade lengths, cut capacities, and applications. Identifying which one you have is essential for ordering the right blades and parts.
For the deep cut model, the Milwaukee 2729-20 is the standard version. The newer Milwaukee 2929-20 has variable speed and improved ergonomics.
Model Identification
M18 FUEL Compact (2829-20)
Designed for electricians and plumbers who cut conduit, unistrut, and thin-wall pipe.
| Specification | Value |
|---|---|
| Model | 2829-20 |
| Cut capacity | 3-1/4 inches |
| Blade length | 35-3/8 inches |
| Blade width | 1/2 inch |
| Motor | Brushless (POWERSTATE) |
| Speed | 550 SFPM, single speed |
| Weight | 9.9 pounds |
| Battery | M18 |
M18 FUEL Deep Cut (2729-20)
Designed for fabricators and mechanics who cut large pipe, thick bar, and structural steel.
| Specification | Value |
|---|---|
| Model | 2729-20 |
| Cut capacity | 5 inches |
| Blade length | 44-7/8 inches |
| Blade width | 1/2 inch |
| Motor | Brushless (POWERSTATE) |
| Speed | 200 SFPM, single speed |
| Weight | 14.7 pounds |
| Battery | M18 |
M18 FUEL Deep Cut (2929-20)
The newer deep cut with variable speed and improved ergonomics.
| Specification | Value |
|---|---|
| Model | 2929-20 |
| Cut capacity | 5 inches |
| Blade length | 44-7/8 inches |
| Motor | Brushless (POWERSTATE) |
| Speed | 200 to 550 SFPM, variable |
| Weight | 14.7 pounds |
| Battery | M18 |
How to Identify Your M18 Band Saw
By cut capacity: Measure the C-frame opening. 3-1/4 inches means compact (35-3/8 inch blade). 5 inches means deep cut (44-7/8 inch blade).
By weight: The compact weighs 9.9 pounds. The deep cut weighs 14.7 pounds. A 5-pound difference is noticeable.
By variable speed: If the saw has a variable speed dial, it is the 2929-20. The 2729-20 and 2829-20 have single speed.
By blade length: If you have an old blade, measure it. 35-3/8 inches means compact. 44-7/8 inches means deep cut.
By model number: Check the label on the saw. 2829-20 is the compact. 2729-20 and 2929-20 are the deep cut.
Blade Selection
Compact (35-3/8 Inch Blades)
| TPI | Part Number | Best For |
|---|---|---|
| 14 TPI | 48-39-0518 | Medium wall pipe, thin bar, aluminum |
| 18 TPI | 48-39-0519 | Conduit, thin-wall tubing, general purpose |
| 24 TPI | 48-39-0520 | Sheet metal, small round stock |
Deep Cut (44-7/8 Inch Blades)
| TPI | Part Number | Best For |
|---|---|---|
| 10 TPI | 48-39-0502 | Thick pipe, solid bar, structural steel |
| 14 TPI | 48-39-0503 | Medium thickness, smoother cuts |
| 18 TPI | 48-39-0504 | Thin-wall tubing, conduit, sheet metal |
All blades are bi-metal M42 with 1/2 inch width and 0.020 inch thickness.
Setup
Install the blade. Open the blade guard, release tension, install the blade with teeth pointing down, tension the blade, close the guard.
Check tracking. Run the saw briefly and check that the blade tracks straight. Milwaukee saws have fixed tracking that rarely needs adjustment.
Adjust the blade guides. The roller bearing guides should be close to the blade but not touching during free running.
Adjust the shoe. The shoe should be square to the blade. If cuts are not square, adjust or replace the shoe.
Set the speed (2929-20 only). If your saw has variable speed, set the speed dial to match the material. Lower speed for harder material, higher speed for softer material.
Common Repairs
Blade Guide Wear
The roller bearing guides can develop play after extended use. Symptoms include blade wandering and poor cut quality.
Repair: Replace the guide bearings. Milwaukee sells replacement guide kits for 30 to 50 dollars. Installation takes about 15 minutes.
Switch Failure
The trigger switch can fail after years of use. Symptoms include intermittent operation or the saw not starting.
Repair: Replace the switch. Cost is 15 to 25 dollars. Takes about 15 minutes.
Motor Failure
The brushless motor is generally reliable but can fail after heavy use. Symptoms include no power, intermittent operation, or a burning smell.
Repair: The motor assembly is replaceable but expensive (80 to 180 dollars). For a used saw, motor replacement may not be cost-effective.
Shoe Wear
The shoe can wear from contact with the workpiece. A worn shoe causes angled cuts.
Repair: Replace the shoe. Cost is 20 to 35 dollars.
Battery Contact Issues
If the saw does not start or starts intermittently, the battery contacts may be dirty or worn.
Repair: Clean the battery contacts with a wire brush. If the contacts are worn, replace the contact plate. Cost is 10 to 15 dollars.
2729-20 vs 2929-20: Which to Choose
2729-20 (original deep cut):
- Single speed (200 SFPM)
- Proven design
- Widely available
- Lower price (280 to 350 dollars bare tool)
2929-20 (newer deep cut):
- Variable speed (200 to 550 SFPM)
- Improved ergonomics with larger handle
- Better balance
- Tool-free blade change
- Higher price (300 to 380 dollars bare tool)
Which to choose: If you cut a mix of materials and need speed control, the 2929-20 is worth the extra cost. If you only cut thick material at one speed, the 2729-20 is sufficient.
FAQ
What is the difference between the M18 compact and deep cut band saw?
The compact (2829-20) has a 3-1/4 inch cut capacity and uses a 35-3/8 inch blade. The deep cut (2729-20, 2929-20) has a 5-inch cut capacity and uses a 44-7/8 inch blade. The blades are not interchangeable.
How do I identify which M18 band saw I have?
Check the model number on the label. If the label is worn, measure the cut capacity: 3-1/4 inches is the compact, 5 inches is the deep cut. Or measure the old blade: 35-3/8 inches is compact, 44-7/8 inches is deep cut.
What blade does the M18 compact use?
A 35-3/8 inch blade in 1/2 inch width. Available in 14, 18, and 24 TPI.
What blade does the M18 deep cut use?
A 44-7/8 inch blade in 1/2 inch width. Available in 10, 14, and 18 TPI, plus 10/14 variable pitch from LENOX.
Where can I find parts for my M18 band saw?
Milwaukee Tool Service, eReplacementParts, and aftermarket suppliers. Blades, guide bearings, switches, and shoes are widely available.
Is the 2929-20 worth the extra cost over the 2729-20?
If you need variable speed or want better ergonomics, yes. If you only cut thick material at one speed, the 2729-20 is sufficient.
References
- Milwaukee Tool. “M18 FUEL Compact Band Saw Owner’s Manual.” Model 2829-20.
- Milwaukee Tool. “M18 FUEL Deep Cut Band Saw Owner’s Manual.” Models 2729-20, 2929-20.
- Milwaukee Tool. “Portable Band Saw Blade Specifications.” Milwaukee Tool Product Catalog.
- Milwaukee Tool. “Service Parts Lists for M18 Band Saws.” Milwaukee Tool Service.
- Pro Tool Reviews. “Milwaukee M18 Band Saw Lineup Guide.” ProToolReviews.com.
