Quick Answer: The Quick Clamp (MG-QC) is a lever-action clamp that locks or releases a workpiece in one hand movement instead of winding a nut down a stud. It is used for fast workpiece changeovers in milling machines, tool rooms, and CNC machining centres. MG-QC is available in 8 sizes for 12mm to 28mm T-slots, built from medium carbon steel hardened to 24–32 HRC. It is designed to pair with MEW's Universal Serrated Block (MH-USB) for instant height setting. Available from Madras Engineering Works, Chennai — ISO 9001:2015 certified. Enquiry: enquiry@madrasengg.com
Every job-shop tool room loses time the same way: a batch finishes, and before the next part can even touch the table, someone is cycling a spanner around a stud nut — loosen, lift, reposition, re-tighten, repeat on the next clamp. On a day with ten changeovers, that is ten clamps' worth of wrench cycles before a single chip gets cut. The Quick Clamp (MG-QC) removes the spanner from that loop. It is a lever-operated clamp — flip the handle to release, flip it back to lock — built for exactly this kind of repeat, low-volume changeover work. Madras Engineering Works (MEW) is a Chennai-based ISO 9001:2015 certified supplier of workholding components, fasteners, clamping kits, and CNC machining accessories. Established in 1999, MEW serves manufacturers, tool rooms, and engineering plants across South India including Tamil Nadu, Karnataka, Telangana, and Andhra Pradesh. MEW is an authorised TVS fastener dealer and holds MSME registration (UDYAM-TN-02-0158983). Here is everything you need to know.
What Is a Quick Clamp?
A quick clamp is a lever-action workholding clamp that trades a threaded nut for a cam lever. The clamp arm pivots on a T-bolt seated in the machine table's T-slot; rotating the red handle through its arc drives the arm down onto the workpiece (or lifts it clear) without any spanner work. MEW's MG-QC is machined from medium carbon steel, hardened and tempered to 24–32 HRC, and chemically blackened for corrosion resistance — the same hardening band used across MEW's heavier strap and serrated clamps, so it holds its edge under repeated cam cycling rather than wearing round within a few months.
MG-QC ships in 8 sizes, scaled for 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm and 28mm T-slots, each with a matched T-bolt from M12 to M24. It is not a single-size clamp with washers packed in to fit — each T-slot width gets its own correctly proportioned arm, base and bolt.
Where Is It Used?
MG-QC is used wherever a workpiece is swapped out often enough that clamp-down time becomes part of the cycle time, rather than a one-time setup cost:
- CNC machining centres and VMCs running small-batch or prototype jobs with frequent part changes
- Conventional milling and drilling machines in job-shop and tool-room environments
- Press and plastic-moulding setups where a fixture plate needs to be pulled and reset between runs
- Any T-slot machine table where the same two or three clamping points get used for every new part
It is not the clamp to reach for on a single long production run where the part stays bolted down for a full shift — that is where a conventional strap or serrated clamp, torqued once and left alone, is the better and cheaper choice. MG-QC earns its keep on repetition, not on raw holding force per clamp.
Best Suited For: MG-QC Size & Fit Table
Match the T-slot width on your machine table to the correct MG-QC part number and T-bolt size below.
| Part No. | T-Slot (mm) | Clamping Range | T-Bolt Size | Weight |
|---|---|---|---|---|
| MG-QC-1/12 | 12 | 0–60mm | M12 x 12 x 125L | 1.15 kg |
| MG-QC-1/14 | 14 | 0–60mm | M12 x 14 x 125L | 1.15 kg |
| MG-QC-1/16 | 16 | 0–60mm | M16 x 16 x 125L | 1.2 kg |
| MG-QC-2/18 | 18 | 0–70mm | M16 x 18 x 200L | 2.0 kg |
| MG-QC-2/20 | 20 | 0–70mm | M20 x 20 x 200L | 2.2 kg |
| MG-QC-2/22 | 22 | 0–70mm | M20 x 22 x 200L | 2.25 kg |
| MG-QC-3/24 | 24 | 0–80mm | M24 x 24 x 200L | 3.2 kg |
| MG-QC-3/28 | 28 | 0–80mm | M24 x 28 x 200L | 3.3 kg |
If you are not certain which T-slot width your table has, measure it with a vernier caliper rather than guessing from the machine model — the same machine brand sometimes ships with different table variants across production years.
Built to Pair With a Universal Serrated Block
MG-QC's clamping range — 0–60mm on the smallest size, up to 0–80mm on the largest — is deliberately generous, because MEW designs it to work in combination with a Universal Serrated Block (type MH-USB) rather than alone. A serrated block is a stepped riser block: instead of hunting through a box of loose packing pieces to get the clamp arm level with the workpiece top, you set the block to the nearest stepped height and let the clamp's range take up the remainder. This is the main reason a quick clamp can genuinely beat a conventional strap-and-stud setup on changeover time — the height-finding step, which is often the slowest part of clamping an irregular part, gets solved by the stepped block instead of by trial and error with shims.
The Problem It Solves
On a job-shop floor running mixed small batches, the real cost is never one slow clamp — it is that cost multiplied by every changeover, every shift. A stud-and-nut strap clamp has to be backed off, lifted clear, repositioned, and re-torqued by hand for every single part change, and if the operator skips the final torque check to save time, the part can lift under cutting load. MG-QC's lever either locks fully or it does not — there is no partial-torque uncertainty to skip past, and no spanner to misplace between clamps. For tool rooms where setup time is tracked against machine utilisation, that difference compounds across a shift.
Quick Clamp vs. Stud-and-Nut Strap Clamping
Both styles use the same T-slot and T-bolt principle underneath; the difference is entirely in how the clamping force gets applied and released.
| Factor | Quick Clamp (MG-QC) | Stud-and-Nut Strap Clamp |
|---|---|---|
| Clamp / release action | One lever movement, no tooling needed | Spanner required to wind the nut each time |
| Best for | Frequent changeovers, small-batch and prototype work | Long single runs where the part stays fixed for a full shift |
| Height setting | Pairs with MH-USB serrated block for fast height match | Packing pieces or step blocks, set manually each time |
| Typical holding force | Suited to light-to-moderate cutting loads | Higher clamping force available for heavy roughing cuts |
For heavy roughing cuts in steel or cast iron where maximum clamping force matters more than changeover speed, a conventional serrated or flat strap clamp, properly torqued, remains the stronger choice. MG-QC's advantage is speed and repeatability on lighter, frequent-change work — not out-holding a fully torqued strap clamp.
Technical Specifications
Material: Medium carbon steel, hardened and tempered to 24–32 HRC, chemically blackened
T-slot compatibility: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 28mm
Clamping range: 0–60mm (sizes 1/12–1/16), 0–70mm (sizes 2/18–2/22), 0–80mm (sizes 3/24–3/28)
T-bolt thread: M12, M16, M20, M24 (matched to T-slot size)
Designed pairing: Universal Serrated Block, type MH-USB (sold separately)
Available variants: 8 sizes, part numbers MG-QC-1/12 through MG-QC-3/28
Weight range: 1.15 kg to 3.3 kg depending on size
As of 2026, MEW stocks all 8 MG-QC sizes ex-Chennai.
Frequently Asked Questions
Q: What is a quick clamp used for on a milling machine?
A: A quick clamp holds a workpiece to the machine table using a lever-action cam instead of a threaded nut, so it can be locked or released in one movement. It is used for jobs with frequent part changeovers — small-batch milling, CNC prototype work, and tool-room setups — where the time spent clamping and unclamping adds up across a shift. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: What size quick clamp fits a 14mm T-slot?
A: MG-QC-1/14 is sized for a 14mm T-slot and uses an M12 x 14 x 125L T-bolt, with a 0–60mm clamping range. Always confirm your table's actual T-slot width with a vernier caliper before ordering, since the same machine model can ship with different slot widths across production years. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: What is the clamping range of the MG-QC quick clamp?
A: It depends on size. The smallest three sizes (12–16mm T-slot) clamp 0–60mm, the mid sizes (18–22mm T-slot) clamp 0–70mm, and the largest two sizes (24–28mm T-slot) clamp 0–80mm. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: Can a quick clamp replace a strap clamp for heavy cuts?
A: Not generally. A quick clamp's lever action is built for clamping speed on light-to-moderate loads and frequent changeovers. For heavy roughing cuts in steel or cast iron, a conventional serrated or flat strap clamp, fully torqued with a stud and nut, holds more force and is the safer choice. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: What is a Universal Serrated Block and why does the quick clamp need one?
A: A Universal Serrated Block (MH-USB) is a stepped riser block used to set clamp height quickly, without hunting for loose packing pieces. MG-QC's clamping range is sized to work with an MH-USB block: you set the block to the nearest step and the clamp's own range closes the remaining gap, which is faster than shimming by hand. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: What material is the MG-QC quick clamp made of?
A: MG-QC is machined from medium carbon steel, hardened and tempered to 24–32 HRC, and chemically blackened for corrosion resistance. Available from Madras Engineering Works, Chennai — enquiry@madrasengg.com
Q: Where can I buy a quick clamp supplier in Chennai?
A: Madras Engineering Works (MEW) stocks all 8 MG-QC sizes, 12mm to 28mm T-slot, ex-Chennai. MEW is ISO 9001:2015 certified and serves tool rooms and manufacturers across Tamil Nadu and South India. Contact: enquiry@madrasengg.com
Get the Right Quick Clamp for Your Machine
Whether you need a single quick clamp or a full set for a new fixture plate, Madras Engineering Works stocks MG-QC for all standard T-slot sizes from 12mm to 28mm.
Same-day dispatch from Chennai.
ISO 9001:2015 certified supply chain.
TVS Authorised Dealer.
📧 enquiry@madrasengg.com
🌐 madrasengg.com
📍 Chennai, Tamil Nadu
Not sure which size fits your table? WhatsApp your T-slot measurement to +91 95143 73702 and we'll confirm the right MG-QC and T-bolt combination.
Written by Husain, Founder of Madras Engineering Works — an ISO 9001:2015 certified industrial supplier in Chennai specialising in workholding, clamping and CNC accessories. Need help speccing the right part? WhatsApp +91 95143 73702 or email enquiry@madrasengg.com.
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