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TFI Co. (TFI Machines & Steel Blades) supplies M42 bi-metal bandsaw blade stock in coils and in bulk to workshops, saw service centres and production plants in Dubai and across the UAE. This page explains the three M42 models available, how coil stock differs from ready-welded blades, who benefits from buying coil, and what equipment you need to weld and anneal your own blades.
The M42 bi-metal range in coil
All three models use an M42 high-speed steel cutting edge on a flexible spring-steel back, and differ in tooth geometry. M42 is a cobalt HSS, roughly 8% cobalt with molybdenum, prized for hot hardness: the tooth keeps its edge at the heat of metal cutting. TFI Co. has served the UAE and GCC since 1965.
M42 coil models
M42 HSS edge, tooth hardness Rc 67-69, 0 degree rake. General metal and mild steel cutting.
M42 HSS edge, tooth hardness Rc 67-69, specialised tooth geometry with positive rake. Structural steel and stainless steel.
Special relief angle tooth design for high heat resistance. Superalloys, copper, stainless steel and exotic materials.
M42 HSS edge, tooth hardness Rc 67-69, 0 degree rake. General metal and mild steel cutting.
M42 HSS edge, tooth hardness Rc 67-69, specialised tooth geometry with positive rake. Structural steel and stainless steel.
Special relief angle tooth design for high heat resistance. Superalloys, copper, stainless steel and exotic materials.
| Cutting edge | M42 high-speed steel |
|---|---|
| Tooth hardness (BAM, Yazd) | Rc 67-69 |
| Rake angle | BAM 0 degree; Yazd positive |
| BAM standard sizes | 19 x 0.9 mm, 27 x 0.9 mm, 34 x 1.1 mm, 41 x 1.3 mm |
| Supply | Coils and bulk orders, Dubai, UAE |
- Cutting edge
- M42 high-speed steel
- Tooth hardness (BAM, Yazd)
- Rc 67-69
- Rake angle
- BAM 0 degree; Yazd positive
- BAM standard sizes
- 19 x 0.9 mm, 27 x 0.9 mm, 34 x 1.1 mm, 41 x 1.3 mm
- Supply
- Coils and bulk orders, Dubai, UAE
Choosing between BAM, Yazd and Qom
The rake angle is the main difference, and Qom adds extra clearance for heat:
| Model | Tooth geometry | Why it works | Best for |
|---|---|---|---|
| BAM | 0 degree rake | Strong, stable tooth | Mild steel, general fabrication, mixed workshop cutting |
| Yazd | Positive rake | Slices in with less force, so the tooth cuts instead of rubbing and work-hardening the surface | Structural sections, stainless steel |
| Qom | Special relief angle | More clearance behind the edge, less friction and heat | Nickel superalloys, copper, stainless, exotic materials |
BAM
- Tooth geometry
- 0 degree rake
- Why it works
- Strong, stable tooth
- Best for
- Mild steel, general fabrication, mixed workshop cutting
Yazd
- Tooth geometry
- Positive rake
- Why it works
- Slices in with less force, so the tooth cuts instead of rubbing and work-hardening the surface
- Best for
- Structural sections, stainless steel
Qom
- Tooth geometry
- Special relief angle
- Why it works
- More clearance behind the edge, less friction and heat
- Best for
- Nickel superalloys, copper, stainless, exotic materials
Coils versus welded blades
Welded blades
Supplied ready to fit, cut and welded to your machine length. No welding equipment or skills needed on site. Best when you run a few machines on a handful of sizes and change blades occasionally.
Coil stock
A continuous length of band on a reel, cut and welded to length on your own premises. Lower cost per metre, any length on demand, and one coil serves every machine that takes that width and thickness.
The decision comes down to volume and variety. A shop with one bandsaw is almost always better off with welded blades. A plant with several saws of the same width, or a business welding blades for customers, usually saves money and downtime by holding coil.
Who should buy M42 coils in bulk
Typical coil buyers
Saw service centres and blade resellers
Weld blades to order for their own customers.
Steel stockholders
Run a fleet of production bandsaws around the clock.
Large fabrication and manufacturing plants
Cannot wait for a replacement when a blade breaks mid-shift.
Sites with non-standard machines
Need unusual blade lengths that are not stocked welded.
Maintenance departments
Want one stock item covering several machines that share a band size.
Saw service centres and blade resellers
Weld blades to order for their own customers.
Steel stockholders
Run a fleet of production bandsaws around the clock.
Large fabrication and manufacturing plants
Cannot wait for a replacement when a blade breaks mid-shift.
Sites with non-standard machines
Need unusual blade lengths that are not stocked welded.
Maintenance departments
Want one stock item covering several machines that share a band size.
Planning coil stock and scheduled call-offs
List every saw with its blade width, thickness, length and usual materials.
Identify the two or three size and TPI combinations that cover nearly all the work; hold those as coil.
Buy rarely used sizes as welded blades, so stock investment stays low.
Agree a delivery rhythm, monthly or quarterly, that matches your consumption.
Review consumption every few months and adjust coil quantities.
List every saw with its blade width, thickness, length and usual materials.
Identify the two or three size and TPI combinations that cover nearly all the work; hold those as coil.
Buy rarely used sizes as welded blades, so stock investment stays low.
Agree a delivery rhythm, monthly or quarterly, that matches your consumption.
Review consumption every few months and adjust coil quantities.
We appreciate scheduled orders: a regular coil call-off lets us plan your stock and keeps a broken blade on a main saw a matter of minutes, not days. Bulk coil quantities also get good prices.
Welding and annealing requirements
Coil only pays off if the welds are reliable; a blade almost always breaks at a poor weld long before the teeth wear out. To weld bi-metal blades from coil you need:
A flash butt blade welder
with capacity for the width and thickness you buy.
Square, clean cuts
on both ends, with tooth pitch matched across the joint.
Annealing of the weld zone.
Welding leaves the joint hard and brittle; temper it with the welder's annealing cycle, using the maker's bi-metal settings.
Grinding the flash
flush on both faces and the back, without touching the teeth.
A final check
that the blade is straight and the weld aligned.
A flash butt blade welder
with capacity for the width and thickness you buy.
Square, clean cuts
on both ends, with tooth pitch matched across the joint.
Annealing of the weld zone.
Welding leaves the joint hard and brittle; temper it with the welder's annealing cycle, using the maker's bi-metal settings.
Grinding the flash
flush on both faces and the back, without touching the teeth.
A final check
that the blade is straight and the weld aligned.
| Weld problem | Likely cause | Remedy |
|---|---|---|
| Blade snaps at the weld soon after fitting | Weld not annealed, or annealed too little | Re-weld and run the full bi-metal annealing cycle |
| Blade jumps or ticks in the guides | Ends misaligned, or flash left proud on the back | Clamp ends straight; grind the back and faces flush |
| Teeth chip at one point each revolution | Pitch not matched across the joint, leaving a gap or a short tooth | Cut both ends at the same point in the tooth pattern |
| Porous or cracked joint | Dirty or out-of-square ends | Square-cut and clean both ends before welding |
Blade snaps at the weld soon after fitting
- Likely cause
- Weld not annealed, or annealed too little
- Remedy
- Re-weld and run the full bi-metal annealing cycle
Blade jumps or ticks in the guides
- Likely cause
- Ends misaligned, or flash left proud on the back
- Remedy
- Clamp ends straight; grind the back and faces flush
Teeth chip at one point each revolution
- Likely cause
- Pitch not matched across the joint, leaving a gap or a short tooth
- Remedy
- Cut both ends at the same point in the tooth pattern
Porous or cracked joint
- Likely cause
- Dirty or out-of-square ends
- Remedy
- Square-cut and clean both ends before welding
Storing and handling coil
Keep coils in their dispenser box or on a reel, dry and away from coolant splash and the humidity of an unconditioned store.
Uncoil carefully: bi-metal stock is under spring tension and can unwind sharply.
Wear cut-resistant gloves and eye protection when cutting band ends; gloves also keep hand sweat off the steel.
Give long-stored coils a light oil film or rust-preventive wrap.
Label part-used coils with model, size and TPI.
Keep coils in their dispenser box or on a reel, dry and away from coolant splash and the humidity of an unconditioned store.
Uncoil carefully: bi-metal stock is under spring tension and can unwind sharply.
Wear cut-resistant gloves and eye protection when cutting band ends; gloves also keep hand sweat off the steel.
Give long-stored coils a light oil film or rust-preventive wrap.
Label part-used coils with model, size and TPI.
Is coil cheaper than buying welded blades?
Per metre, coil is normally the lower-cost option, but only if you already have, or will invest in, a suitable welder and trained operators. For low volumes, welded blades are simpler.
Can you supply welded blades from the same M42 stock?
Yes. If you prefer not to weld in-house, we can supply BAM, Yazd or Qom welded to your machine length.
Which model should I buy for stainless steel?
Yazd is recommended for structural steel and stainless steel. For difficult stainless grades, superalloys or copper, consider Qom.
What do I need to specify for a coil order?
Model, width x thickness, TPI, coil metres or number of coils, and delivery emirate. See the guide to ordering TFI Co. bandsaw blades for more.
Do welds need annealing on bi-metal blades?
Yes. An unannealed weld is brittle and will crack quickly in service. Anneal every weld using the cycle your welder maker specifies for bi-metal stock.
Order M42 coiled bandsaw blades online
Please give the model (BAM, Yazd or Qom), width x thickness, TPI, the coil metres or number of coils, the materials you will cut, the quantity, and the delivery emirate. If you also need welded blades, add the lengths. Bulk coil orders get good prices, and we are happy to set up a scheduled monthly or quarterly call-off.
- Section
- Bandsaw guides
- Updated
- October 20, 2026
- Reading time
- 6 min read
Order or plan your blade supply
We appreciate scheduled orders, favour planned blade maintenance and offer good prices for bulk orders. Tell us what you need and our team replies by email.
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