Flange
1018 Steel · As machined
- Ø100 mm × 15 mm, Ø42 mm center bore
- CNC turned · 4 × Ø14 mm holes on a 75 mm bolt circle
1 pc
$57.40
USD / pc
25 pcs
$23.90
USD / pc
-58.36%100 pcs
$19.07
USD / pc
-66.78%CNC turning and milling · From 1 part
Steel
Machining
Custom steel parts in 1018, 1045, 4140, 12L14 and tool steel: flanges, shafts, pulleys, couplings, axles and bushings. Upload your file and see your price from one part.
Stepped shaft
4140 Steel · Ø25 × 150 mm, with keyway
1 pc
$48.80 USD
per part
25 pcs
$20.34 USD
per part
-58%100 pcs
$16.29 USD
per part
-67%What we machine in steel
Steels we machine
Low carbon: 1018 and A36
The most economical and easiest to weld. Flanges, plates, bushings and lightly loaded parts.
Learn more
Medium carbon: 1045
Stronger than 1018 and can be hardened. Shafts, axles, pulleys, pins and gears.
Learn more
Free machining: 12L14 and 1144
They cut faster and cost less. Couplings, fittings, pins and turned parts with many threads.
Learn more
Alloy: 4140, 4340, 8620 and 9840
For parts that carry load, spin or take impact. Drive shafts, axles, power couplings and tooling.
Learn more
Tool steel: H13, D2 and A2
Hard and wear resistant. Punches, dies, mold inserts, blades and wear parts.
Learn moreTypical parts
What we’re asked for most in steel
Axles
Plain or stepped, with threaded ends and bearing seats.
Quote one like this
Bushings
Plain, flanged or threaded, in 1018 for general use or 4140 for load.
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Custom pins
Pins, clevis pins and pivot pins in sizes you can’t buy off the shelf.
Quote one like this
Dowel pins
Flat or round pins, with a cotter-pin hole or retaining-ring groove.
Quote one like thisPrice examples
How the price changes with quantity
Steel parts quoted with the same pricing model as the portal: setup is spread across more parts, so the price per part drops.
Already have your part? Quote it online
Pulley
1045 Steel · As machined
- Ø80 mm × 40 mm, single V-groove
- CNC turned · Ø20 mm bore
1 pc
$74.90
USD / pc
25 pcs
$31.47
USD / pc
-57.98%100 pcs
$26.38
USD / pc
-64.78%
Coupling
12L14 Steel · As machined
- ½" NPT female on both ends
- CNC turned · Ø28 mm × 38 mm
1 pc
$28.60
USD / pc
25 pcs
$11.52
USD / pc
-59.72%100 pcs
$8.16
USD / pc
-71.47%
Reference amounts in USD per part (excluding shipping and tax). Final pricing depends on geometry, tolerances, finishes and material availability.
Which steel?
If your part is lightly loaded, 1018. For a shaft or pulley, 1045. With many threads, 12L14 is cheaper. If it carries load or takes impact, 4140. For a punch or die, tool steel. Upload your file and we’ll help you choose.
Upload my fileMaterials
Steels we offer
The same ones you pick in the portal when configuring your part.
Carbon and alloy
Steel 1018
Low carbon, economical and weldable.
Steel A36
Structural, for plates and flanges.
Steel 1045
Medium carbon, for shafts and pulleys; hardenable.
Steel 12L14
Free machining, the fastest to cut.
Steel 1144
Free machining and stronger than 12L14.
Steel 4140
General-purpose alloy for load and impact.
Steel 4340
High-strength, high-toughness alloy.
Steel 8620
Case-hardening: hard surface, tough core.
Steel 9840
Alloy for high-strength axles and shafts.
Tool steel
Tool Steel H13
Hot work: mold inserts and dies.
Tool Steel D2
Very wear resistant: punches, dies and blades.
Tool Steel A2
Air hardening, stable: dies and tooling.
Why PREMSA
Your steel parts, from one-off spares to production
We help you choose the steel, make parts from one piece and check every lot before it ships.
From 1 part
No minimum quantity: a replacement part, a prototype or a production run, with quantity pricing in the quote.
Certified material
Steel from Monterrey suppliers, with material certificates on request.
Inspection and reports
Dimensional report, FAI and certificates on request, so your quality team can release without re-measuring.
Shipping to 52 countries
From Monterrey to all of Mexico and 52 countries, with duties estimated before you pay.
To design your part
Machining guides
FAQ
About steel machining
- Which steels do you machine?
- Carbon and alloy: 1018, A36, 1045, 12L14, 1144, 4140, 4340, 8620 and 9840. Tool steel: H13, D2 and A2. You pick them in the portal when configuring your part.
- What’s the difference between 1018, 1045 and 4140 steel?
- 1018 is low carbon: economical, easy to weld and good for lightly loaded parts. 1045 has more carbon, is stronger and can be hardened: the classic for shafts and pulleys. 4140 is alloyed with chromium and molybdenum: the strongest of the three, for parts that carry load, spin or take impact.
- Do you make custom shafts, flanges and pulleys?
- Yes: shafts and axles with steps, keyways and threads; flanges with their bolt pattern; pulleys with their groove and keyway; couplings, bushings, pins and dowels. Made to your drawing, or copying a part you already have if you send us its dimensions.
- How much does a steel machined part cost?
- It depends on size, shape and quantity. As a reference, this page shows real parts priced at 1, 25 and 100 pieces: with more quantity, setup is spread out and the price per part drops up to 70%. Upload your file to see the exact price of yours.
- What tolerances can you hold in steel?
- By default, ISO 2768-m general tolerances apply. On dimensions you call out on your drawing —like a bearing seat on a shaft— we can hold ±0.025 mm, and critical dimensions are checked in inspection.
- Can I order a single part?
- Yes. There’s no minimum: you quote from one part, and the quote shows how the price per part drops with quantity.
- Do I get a material certificate?
- Yes, on request. When configuring your part, check that you need a material certificate and traceability, and it ships with your order.
- Do you ship outside Monterrey?
- Yes, across Mexico and to 52 countries. The portal shows shipping and, for international orders, estimated duties before you pay.
Custom steel parts, CNC machined
Steel is what most machinery is made of: it’s strong, weldable, hardenable and inexpensive. That’s why it’s machined into flanges, drive shafts, axles, pulleys, couplings, bushings, pins and dowels, and into spare parts for machinery, pumps, conveyors and farm equipment.
Which steel to choose? 1018 is the most economical and easiest to weld, for lightly loaded parts. 1045 has more carbon: it’s stronger and can be hardened, the classic choice for shafts and pulleys. 12L14 and 1144 cut faster, so a part with many threads costs less. 4140 is the general-purpose alloy steel for parts that carry load or take impact; 4340 takes even more, 8620 is case-hardened for a hard surface and tough core, and 9840 is used in high-strength axles and shafts. For punches, dies and mold inserts, tool steels H13, D2 and A2.
Steel turning is the most common —shafts, flanges, pulleys, couplings, bushings and pins come from round bar— and milling makes plates, brackets, keyways and prismatic parts. On a CNC lathe with Y axis, a shaft comes off with its keyway and flats in a single setup.
Unlike a directory or a shop that answers in days, at PREMSA you upload your STEP or PDF drawing, choose the steel and quantity, see your price and order from one part.
Engineering tools
To choose the steel, fits and threads
Free datasheets and charts before you quote.
Got a part in mind?
Upload it and we’ll make it real. One part or a thousand.