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Smith Machine Rack Attachment

4.7
Rated 4.7 out of 5 stars
9 Reviews
$624.99 USD $893.99

Supercharge your strength & size with this ultra-slim rack attachment.

Bar Type

Product Details

Get every benefit of a Smith machine without buying a 6-foot standalone unit or losing half your garage—this bolts right onto your existing rack.

  • Transforms your rack, not your floor plan → Attaches directly to compatible power racks, adding guided pressing and squatting without requiring a dedicated Smith machine footprint or separate station.
  • Save $1,000+ over standalone units → Full Smith machines run $1,500-3,000 and eat up 6+ feet of floor space—this gives you the same functionality for a fraction of the cost by working with what you already own.
  • Lift solo without the fear → Built-in safety catches every few inches mean you can max out on bench press at 6 AM without a spotter or risking a bar to the chest—just twist and lock.
  • Zero setup between exercises → Go from squats to bench to rows in seconds on the Smith attachment, then swing out to free weight training on your rack, it's like having two stations in one footprint.
  • Smooth, commercial-grade bearings → The linear rail system glides like butter, not like a rusty playground slide,so you can focus on the lift instead of fighting janky movement.
  • Built to last decades → Heavy-duty steel construction handles daily punishment without developing that sketchy wobble or needing replacement parts every year.

Turn your power rack into a two-in-one training station without giving up your car's parking spot.

Why a Smith Machine?

Because sometimes you need to push your limits without pushing your luck:

  • Lift alone, lift safely → The bar locks into place every few inches, so if you fail a rep, you just twist your wrists and walk away—no dramatic rollouts or emergency calls.
  • Build muscle with confidence → When you're not worried about balancing the bar, you can focus 100% on squeezing the muscle and lifting heavier, which means faster gains.
  • Train through injuries or rehab → The fixed path lets you isolate specific muscles while protecting joints, making it perfect for working around shoulder tweaks or knee issues without ditching leg day entirely.
  • Master form before going free → Learn the movement pattern with training wheels on, then graduate to free weights when you're ready—no shame in building a foundation first.

Your home gym shouldn't require a spotter on speed dial or a fear of getting pinned under iron.

Specifications

What's Included

Smith Machine Attachment with Bar Includes:

  • Upper mounting brackets (pair)
  • Lower mounting brackets (pair)
  • Linear bearing rails (pair)
  • 36 lb Smith bar (84" total length)
  • Safety catches
  • All mounting and assembly hardware
  • Installation manual

Smith Machine Attachment BYOB (Bring Your Own Bar) Includes:

  • Upper mounting brackets (pair)
  • Lower mounting brackets (pair)
  • Linear bearing rails (pair)
  • Clamshell bar brackets (pair) for quick bar swaps
  • Safety catches
  • All mounting and assembly hardware
  • Installation manual

Note: The Bar Included version also fits 47" wide racks by placing the included spacers on the inner side of each mounting bracket.

Warranty & Guarantees

This Smith Machine Rack Attachment is backed by a Limited Lifetime Warranty, because we build gear that lasts.

We design our attachments to handle years of heavy training. If something goes wrong due to a defect in materials or workmanship, we'll make it right.

Here's what you need to know:

You're covered against manufacturing defects for the lifetime of the product.


What's not covered? Normal wear and tear, cosmetic scratches, damage from improper installation, or using the attachment beyond its 600 lb weight capacity. Also not covered: damage from dropped bars or impact to the linear bearings.

How it works: If you need to make a claim, contact us with your order details and a description of the issue. Our team will review it and get you sorted as quickly as possible.


Assembly Note: We recommend mounting the upper brackets to the top of your uprights and the lower brackets to your crossmembers (inside rack) or front foot stabilizers (outside rack). Brackets can be mounted to uprights only, but a dropped bar could permanently damage the unit.

Questions?Contact our support team — we're here to help.

Shipping & Returns

We get it — shipping heavy gym gear raises some important questions. Here’s exactly what to expect:

Free Shipping: Available on all orders across the continental U.S. No hidden fees.

Shipping Time:  Ships within 1–5 business days. Once shipped, you should expect the order to take up to 7 business days to arrive at your doorstep.

Returns: All Bells of Steel products are backed by our return policy If you don’t love your order, return it within 30 days—simple and stress-free.

See Why 65,000+ Lifters Choose Bells of Steel

Product Features

  • BRING YOUR OWN BAR — OR DON’T

    Choose your weapon! Grab the dedicated Smith Bar for an easy, permanent solution for all exercises. Or, pick the BYOB version and throw your barbell into the clamshell brackets. It’s like building your own gaming PC, but for badass grown-ups who lift heavy sh*t.

  • TINY, SPACE-SAVING FOOTPRINT

    No need for a standalone strength machine. This attachment can be mounted inside your rack for massive space savings. Or attach it to the outside, sitting just 10" off your uprights! This saves room for more important things — like perfecting your front double-biceps pose.

  • MAXIMIZE MUSCLE & STRENGTH

    Thanks to its fixed bar path, you won’t waste a single morsel of energy stabilizing the bar, allowing you to lift heavier weights AND build more muscle. Plus, the easy-to-use safety catches let you train to failure safely without a spotter. That’s right! No more calling Mom for help.

Product Details


BREAKING NEWS: the stigma against Smith machines is over! This Smith Machine Rack Attachment will supercharge your size & strength in an ultra-compact footprint. Now, if only mullets would come back in style…

This widely compatible unit upgrades your 3” x 3” power rack into a beloved bodybuilding beast without the hefty price tag or space requirements.

Bring your own 25-30mm diameter barbell (BYOB) for a higher starting weight and to optimize the attachment for your next training cycle. Or, snag the hollow 36lb Smith bar for an easier assembly & one-and-done solution for all exercises. With a 600-pound total weight capacity, it’s ready for your heaviest ambitions.

Mount this rack attachment on the inside of your rack without taking up any additional footprint in your gym, or attach it to the outside — sitting just 10" off your uprights! Change between a straight or angled bar path with a few simple adjustments to the mounting brackets, making its fixed path feel as natural as possible for your body.

Hit all the staple lifts: squats, presses, rows, and Bulgarian split squats (why are they ALWAYS here?!). But that’s just the start. Incorporate heavy negatives on compounds. Isolate individual muscles with JM presses. You can even rehab stubborn aches in your posterior chain with single-leg Romanian deadlifts.

Recommended Set-Up: Mount the upper brackets to the top of your uprights & the lower brackets to your crossmembers (inside rack) or front foot stabilizers (outside rack). Brackets can be mounted to your uprights only, but a dropped bar could permanently damage the unit.


Bells of Steel Compatibility Chart

The Smith Machine Attachment is compatible with the following Hydra & Manticore racks.

The Bar Included version also fits 47" wide racks by placing the spacers on the inner side of each mounting bracket — watch this video for more compatibility details.

Rack Type
BYOB & Bar Included
4 Post

Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width:
- 47" & 49"

6 Post Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width:
- 47" & 49"
Flat Foot 4 Post / Squat Stand

Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width: 
- 49" only
*Only mounts on an angle. If you want to mount straight up & down, it requires an extra-long set of bolts and additional bushings — available for purchase soon.
**If you have a 56" Hydra Flat Foot, it can only be mounted straight up & down, and requires the Conversion Kit.

Folding 4 Post Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
- Width:
- 47" & 49"
*When mounted, your rack can't fold unless the bar is removed.
84" Light Commercial Rack Compatible when placed on the inside at an angle, but requires all upper crossmembers to be lowered one hole & results in the Lat Pulldown Attachment being incompatible.


Non-BoS Rack Compatibility: The Smith attaches to most non-BoS power racks with the following:
- Tubing between 2.3" x 2.3" and 3" x 3"
- 72" or taller uprights
- 47" or 49" width
- 5/8" or 1" side holes

PRODUCT SPECS


Shipping Details


This product will be shipped in 4 boxes:


1x RAIL-SMTH-HDRMTC-1_4

  • 71" x 10" x 5" / 180 cm x 25 cm x 13 cm
  • 83 lb / 38 kg

1x NUB-SMTH-HDRMTC-2_4

  • 18" x 11" x 4" / 47 cm x 29 cm x 10 cm
  • 35 lb / 16 kg

1x MISC-SMTH-HDRMTC-3_4

  • 11" x 9" x 6" / 28 cm x 22 cm x 15 cm
  • 34 lb / 15 kg

1x BAR-SMTH-HDRMTC-4_4

  • 44" x 11" x 5" / 112 cm x 29 cm x 11 cm
  • 43 lb / 20 kg

You can find the SKU on the front of each box.


4.7
Rated 4.7 out of 5 stars
Based on 9 reviews
Total 5 star reviews: 7 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
89%would recommend this product
Slide 1 selected
9 reviews
  • R
    Randy
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    5 months ago
    Bells of steel smith machine attachment on a ethos power rack

    For those wondering, this product is compatible with an Ethos power rack, but some modifications are necessary. I had to enlarge the half-inch holes to 5/8 inch, which was not a problem. However, the machine cannot be placed vertically at the front of the rack due to the brackets on the bottom. Additionally, some bolts may need to be hammered through due to the tight fit. Assembly was not overly difficult, but calibrating the machine to my barbell was challenging and time-consuming. Once calibrated, the machine works smoothly and effectively, and I highly recommend it.

    Bells of Steel USA
    5 months ago

    Hey Randy,

    We're absolutely thrilled to hear about your successful setup of the Smith Machine Attachment, especially with your creative problem-solving for the Ethos power rack compatibility! Your detailed feedback about the modifications needed and the calibration process is pure gold for other DIY-minded lifters out there. Love that once you got everything dialed in, the smooth operation made it all worthwhile.

    Yours in strength,
    The B.o.S. Crew

  • KC
    KYLE C.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    6 months ago
    Game changer

    This attachment is now the centrepiece of our home gym. I was able to test it out in the Toronto show room and ordered it shortly after. I’m very impressed with the build quality and feel. As someone dealing with a back injury this piece of equipment has unlocked so many exercises when my body isn’t in the mood for traditional barbell lifts. It is worth noting that the range of motion is limited for both depth (due to the lower crossmember required height) and the height because of the length of the guide rods, but accommodates the vast majority of lifts that would be accessible on a standalone smith machine. We opted to leave out the safety catches and springs to allow for a lower depth which hasn’t been an issue because we use it more for accessory work than heavy lifts.

    Bells of Steel USA
    6 months ago

    Thanks for the fantastic review, Kyle! We're thrilled to hear that our Smith Machine Rack Attachment has become such a central piece in your home gym. It's especially meaningful to know that it's helping you work around your back injury and providing safe alternatives to traditional barbell movements. It's great that you were able to try it out in our Toronto showroom first, and that the build quality and feel are meeting your expectations.

    Yours in strength,
    The B.o.S. Crew

  • CM
    Carlos M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    7 months ago
    Awesome add-on to my Rep functional trainer

    I been needing a smith machine but already had a Rep PR 5000. I took a gamble on this BOS smith machine and absolutely love it! I mounted it to the front of my rack and then moved to the inside of my 4 post rack. It works great the quality is awesome and it is smooth!

    It is a little too high so will need to use bumper plates or some type of platform but overall very happy with my purchase!

    Bells of Steel USA
    6 months ago

    Hey Carlos M.,

    Thanks so much for the stellar 5-star review on the Smith Machine Rack Attachment! We’re thrilled to hear it’s working great with your Rep PR-5000 setup — your home gym is looking seriously impressive.

    We’re also glad you’re finding the attachment smooth and high-quality — that's exactly what we aimed for when we designed it!

    Yours in strength,
    The B.o.S. Crew

  • JS
    Jacob s.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    7 months ago
    Smith machine

    First off I love bells of steel equipment, 90% of my home gym is their stuff. Just got this today and even watching the video online on how to assemble it and the 2 manuals included it was a pain to install. Took me and my wife quite a while to figure it out. Now that’s it’s together I can’t wait to use it and it looks like it will work great, but if you get frustrated with good instructions these ones will definitely throw you for a loop.

  • RS
    RYAN S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Great addition

    Really happy with this, so glad they made it an option for the 2.3 rack.

    Bells of Steel USA
    5 days ago

    Hey Ryan,

    Appreciate the 5-star review of our Smith Machine. We're also glad we could make it work for our 2.3" racks as we wouldn't want to leave any customers missing out on such an awesome attachment. Enjoy!

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov
A sturdy silver power rack with adjustable safety bars and an optional Bells of Steel Smith Machine Rack Attachment features numerous holes for customizing height and configuration, ideal for weightlifting exercises like squats and bench presses.
Bells of Steel

Smith Machine Rack Attachment

From $624.99 USD $893.99

BREAKING NEWS: the stigma against Smith machines is over! This Smith Machine Rack Attachment will supercharge your size & strength in an ultra-compact footprint. Now, if only mullets would come back in style…

This widely compatible unit upgrades your 3” x 3” power rack into a beloved bodybuilding beast without the hefty price tag or space requirements.

Bring your own 25-30mm diameter barbell (BYOB) for a higher starting weight and to optimize the attachment for your next training cycle. Or, snag the hollow 36lb Smith bar for an easier assembly & one-and-done solution for all exercises. With a 600-pound total weight capacity, it’s ready for your heaviest ambitions.

Mount this rack attachment on the inside of your rack without taking up any additional footprint in your gym, or attach it to the outside — sitting just 10" off your uprights! Change between a straight or angled bar path with a few simple adjustments to the mounting brackets, making its fixed path feel as natural as possible for your body.

Hit all the staple lifts: squats, presses, rows, and Bulgarian split squats (why are they ALWAYS here?!). But that’s just the start. Incorporate heavy negatives on compounds. Isolate individual muscles with JM presses. You can even rehab stubborn aches in your posterior chain with single-leg Romanian deadlifts.

Recommended Set-Up: Mount the upper brackets to the top of your uprights & the lower brackets to your crossmembers (inside rack) or front foot stabilizers (outside rack). Brackets can be mounted to your uprights only, but a dropped bar could permanently damage the unit.


Bells of Steel Compatibility Chart

The Smith Machine Attachment is compatible with the following Hydra & Manticore racks.

The Bar Included version also fits 47" wide racks by placing the spacers on the inner side of each mounting bracket — watch this video for more compatibility details.

Rack Type
BYOB & Bar Included
4 Post

Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width:
- 47" & 49"

6 Post Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width:
- 47" & 49"
Flat Foot 4 Post / Squat Stand

Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
Width: 
- 49" only
*Only mounts on an angle. If you want to mount straight up & down, it requires an extra-long set of bolts and additional bushings — available for purchase soon.
**If you have a 56" Hydra Flat Foot, it can only be mounted straight up & down, and requires the Conversion Kit.

Folding 4 Post Height:
- 72" (outside rack on uprights only), 84", 90" & 108"
- Width:
- 47" & 49"
*When mounted, your rack can't fold unless the bar is removed.
84" Light Commercial Rack Compatible when placed on the inside at an angle, but requires all upper crossmembers to be lowered one hole & results in the Lat Pulldown Attachment being incompatible.


Non-BoS Rack Compatibility: The Smith attaches to most non-BoS power racks with the following:
- Tubing between 2.3" x 2.3" and 3" x 3"
- 72" or taller uprights
- 47" or 49" width
- 5/8" or 1" side holes

Bar Type

  • Bar Included
  • BYOB (Bring Your Own Bar)
View product